Modality Systems – 3rd Annual Lync Event – Further information


Following on from my previous blog about our 3rd Lync Event we have recently published more information which i would like to share with you.

Firstly we have added another session onto the agenda to talk through what the recent announcement from Microsoft (Skype For Business) means to companies already using Lync or are thinking of moving onto Lync?.

What Modality have to say about it, and what will be covered at the event

Arguably the Skype for Business announcement is one of the biggest announcements of the year, the Skype for Business news is causing much discussion and has divided opinion in some camps. Join us on the 2nd December to hear more about the news and get an insight as to what it could mean for you.

And finally to finish this blog, we are also pleased to announce that we will have a number of industry leading vendors join the event as part of the showcase being held over lunch, representing many of the associated aspects of a UC solution, from hardware infrastructure and connectivity, to devices and applications.

As mentioned at the start of the blog we have limited places left! so Register today!



Modality Systems – Third Annual Lync Event – Tuesday 2nd December


Evening All

We’ Modality Systems are holding our third annual Lync event which builds on the success we had last year. This year we have changed locations but are keeping with the car theme and are hosting our event at the Millbrook Technology Park in Bedfordshire on Tuesday 2nd December.

The theme to our event is around how to keep ahead of the curve in unified Communications, with selected speakers from some of the Modality Systems customers, plus out own in-house experts.

We are limited to 100 seats, so if you would like to attend and listen about to the journey of UC then select the below race track image were you will be hyperlinked to the registration page.

We look forward to seeing you at the event.


Lync Speakerphones – ‘I can hear you loud and sometimes clear’



I’ve been waiting to complete this blog post for a while. And hopefully it will be an insight to the four different speakerphones available on the market at this moment for Lync 2010/2013 and Lync for Mac.

All the vendors have a history of Lync audio devices and some have been selling the optimised speakerphones for a while and a couple of the others have only just entered the market with their respective device. In this review we will look at a number of different scenarios and benchmark each of the devices against each other in a number of real life tests. Its probably worth noting that the tests are none scientific and will be carried out in a normal working environment ie: no sound labs, or noise cancelling walls or booths etc.. These tests are carried out in my open home office.

Note: To the vendors these opinions are my own and not some that maybe my company shares, also if I have missed a feature from your device please don’t take it as I’m biased towards another vendor. I’ve read each of your websites on the device and have a list of features and limitations.

Anyhow, onto the tests and feature sets/scenarios which we will be using.

  • ‘Carry ability’ and Quick-fire use
  • Speaker sound and decibel reading including using for music playing
  • Mic’ usage and decibel reading
  • Technology features
  • Battery life *If applicable and coverage
  • Synopsis and RRP inc Link to the vendor/device website

Before we start on the tests lets quickly speak about each of the offerings available.

First up, one of the two known industry aware devices is the Jabra Speak 510+

Next up, the second of the second industry known device the Plantronics Calisto P620

Third up, a more recent addition to the speaker market the Logitech P710

Then lastly the newest device to hit the market the Sennheiser SP20

Lets take them in the order above

First Up the Jabra Speak 510+


‘Carry ability’ and Quick-fire use

The speak 510+ comes in a neoprene case which keeps the device snug and away from ‘bag clatter’ as you carry it around. Like the older version the speak 410 the 510 and 510+ is an identical device however the 510+ comes with its own Bluetooth dongle for better Bluetooth connectivity. The downside to getting the speak 510+ with its Bluetooth dongle is the fact the little dongle wasn’t catered for as part of the original design process for the speaker and therefore unlike the other vendor speaker devices available, there isn’t away where to store it. For me I just place it in the same neoprene case as the speaker and on a couple of occasions on opening the case the little dongle has dropped out onto the floor. For me this is only a matter of time before its lost somewhere.

That said as a device and once set up I do like this speaker.

With regards to a quickfire connection, in a scenario where you might want a adhoc conference the speak 510+ is a very adapt device to quickly connect at the drop of a hat. The usb cable is picked up within an instant on Lync and a call can quickly take place. If you are to use the bluetooth element of the device then once you’ve found it and picked up the little dongle off the floor and plugged it in, the connection is relativity quick with no requirement for drivers etc (within 10 seconds).

Speaker sound and decibel reading

In all the tests carried out, the sound and speech were clear from 10 ft away (My benchmark distance) and the decibel reading was averaging around 74 decibels on normal talking, which was more than acceptable for use as a mini conference device.

Playing music through the speakerphone is something that it wasn’t really intended to test if I was honest, but as I have seen other real life users using these type of devices in this way I thought it would be good to a least get a rating on the sound readings. Playing music through the speaker the sound max’d at 79 decibels which again from 10 foot away, audibly the sounded was clear but quite mono and ‘tinny’ <no bass>. I wouldn’t really suggest you purchase a speak 510 for music playing only, as there are better devices available to for fill this requirement.

Mic’ usage and decibel reading

The speak 510+ comes with visual little leds to show the volume and speaker outputs, and when set to max and speech placed through the device from 10ft the reading from the sound testing was around 45 decibels, and at times wasn’t clear on some words. That said this was from 10ft away and as Jabra literature says it’s hitting its audible limit of quality at 10ft

Technology features

Jabra have put a couple of tech items into the device, but nothing, which is earth shatteringly new tech. With what seems to be the standard now, it comes with a wired USB connection measuring 1 metre in length and Bluetooth capability via a Bluetooth dongle PLUS also the ability to tether your mobile/cell phone for mobile conference calling.

Additional Bluetooth headsets can also be paired to the speaker for a more private adhoc call. Unfortunately I believe these can only be Jabra Bluetooth headsets. Lastly if required you could also plug jack headphones into the speaker to mute the speaker and remain connected on headphones instead.

***Note: Jabra state that the Bluetooth range is around 100m with class 1 bluetooth and 10m with class 2. Using the Speak 510 with the provided Bluetooth dongle, I can only get 39 metres in a line of sight from my laptop.

Battery life

The battery life for me is one of the major plus points of the device with a average talk and listen time of 9 hours. Talk time of 11 hours and lastly a listen of 12 hours. The Speak 510 scored very high in this test.


The Jabra speak 510+ has been available for a number of years with different variants and versions along the way dating back to the first one to hit the market the Speak 410. As for the design and look and feel, it’s a nice device and is one I carry with me as part of my kit bag. The ease of use is good and the sound quality is one of the best available on the market. I will continue to carry this device and recommend it to my customers.

Link –

RRP – £149.00 but with good ‘googling’ you can get these retail sub £100 now.




Next is the Plantronics Calisto P620



‘Carry ability’ and Quick-fire use

Similar to the Jabra device the Calisto P620 comes in a neoprene carry case but with NO usb cable coiled around the underneath of the device. Plantronics have gone the whole hog and done away with a usb cable physically connected to the device. (More below on this point)

The Calisto sports a square shaped appearance unlike the Jabra and the Sennheiser’s rounded devices and is formed of a more matt looking hardened plastic. Again included with the P620 is a micro usb dongle, which fits snuggly into the bottom of the device for safekeeping.

Quick-Fire using the device is ok, but there are omissions in my opinion, the first one is the lack of physical cable attached. Yes I know that a cable does come with the device and yes it can act as a physical USB connection if required. However I have the P620 and have no idea where my cable is? The second omission is the fact that the device will only pair with the micro usb? Meaning that if you loose it your stuffed until Plantronics sends you another one to pair with.

I can absolutely see the logic in what Plantronics have done with the ‘no cable’ approach but for me it doesn’t work, and while ive been testing the device there were a couple of times when I left the device powered and plugged in and came back to it with a flat battery at which point I had to hunt again for the cable.

Speaker sound and decibel reading

The sound readings from the P620 are a mixed bag to be honest, the decibel readings were slightly higher than the Jabra at an average of 83 decibels, whereas the sound quality was lacking. If im honest I was slightly disappointed on how mono the device sounded, almost a echo type of voice translation.

Mic’ usage and decibel reading

The mic output was loud and clear but similar to the speakers sound quality, the voice sounded very mono and echoing even though I was in an enclosed room. The volume levels from the mic input were good and averaging slightly higher than the Jabra at 52 decibels.

Must say though all in all, for the sound and mic tests I wasn’t overly impressed.

Technology features

Nothing to exciting to write home about on the technology front. As standard we have the Bluetooth connectivity, and also the ability for you to pair your mobile/cell to the speaker.

Also the P620 has the option to utilise the Plantronics software application ‘Spokes’, download here.  Spokes allows you to automatically change your Lync presence status even when you might be on a call on your mobile connected and paired with a Plantronics legend or the Calisto 620. Your status would say ‘in a call’. If you don’t purchase a P620, if you have a Plantronics Legend bluethooth ear headset then it’s still worth the download of the spokes software.

Battery life

The battery life on the P620 was the second lowest in the 4 device test only beating the Logitech P710 by 37 minutes in battery life. On the tests carried out the device lasted 9 ½ hours on average on fulltime usage.


As a company I like Plantronics and what they are trying to do in the Lync estate across all the Lync devices they offer. That said I don’t think the Calisto P620 cuts the mustard in what I would like it to offer. For me it lacked quality in the sound area, the battery life wasn’t the best and the detachable usb cable ‘feature’ for me is a pain. That said I think the build quality is good.

Link –

RRP – £99.00. Yet these are available retail at £75.00




Third up is the Logitech P710


The Logitech P710 is another square shaped device and which hasn’t been on the market for to long, plus it is also the first from Logitech in the Lync speakerphone market.

‘Carry ability’ and Quick-fire use

As usual it comes complete with the now standard neoprene case, but unlike the Jabra and the Plantronics device doesn’t come with a Bluetooth dongle. The fixed usb cable is coiled underneath the device and sits smartly on the desk. Also the device also has a kind of built in stand, which allows for the ‘docking’ without the electrical dock feature to sit devices on top of the p710 giving a viewing angle. On speaking to Logitech this stand is tailored towards the Apple type of iPad device for viewing.

Using the device as a quickfire device is straight forward using the usb cable, which the Lync client picked up the connection in an instant with no driver install. As for the Bluetooth connection and the P710 not having a micro Bluetooth dongle, the device relies on the Bluetooth stack of the laptop/desktop for connectivity, due to this on the couple of machines I tested on there was a considerable delay/sometimes minutes before the device became active. Once the machine knew of the device it would connect a lot quicker thereafter.

Speaker sound and decibel reading

The P710 scored the lowest of all the devices in the sound stakes as the volume isn’t overly loud even when sat a couple of feet away. On the decibel reading from 10ft away I was seeing only 54 decibels readings on sound output and due to this low reading listening to someone speak really did take some concentration, to the point where you wasn’t listening to what content was being said but more on what word was being spoken.

Mic’ usage and decibel reading

Keep in mind with what ive just mentioned on the low sound from the P710, using the mic was equally as poor noise quality and talking from 10 foot away produced a decibel reading of 38. The device simply could cope with the distance I was testing at.

If however you wanted a device that the sound quality was good and you was always planning to sit close, the Logitech P710 could be something you might look at.

Technology features

Logitech has gone down the road of more is better’ ‘pack the tech’ into the device approach which has its plus and minus points. For instance one of the features Logitech boosts about is the ability to utilise the NFC (Near Frequency Communication) bus for connectivity. NFC was one of them flash in the pan bits of tech which no ones ever uses. I do hope Logitech didnt spend a lot of money on R&D on the NFC feature in the device as its pointless.

Next is the sliding docking? I have no idea why that was deemed a good idea by the product group, and in all the testing both in the lab and onsite have I every thought about docking my mobile device on top of it. Again for me its another pointless feature, unless the market is for a consumer device as i could see this as a nice feature.

Having the Bluetooth feature is great, but we all know how notoriously bad the Bluetooth stack is on some laptops, and at best I would only really trust it with using with a Bluetooth mouse NOT voice !

Other tech features include stereo music playback ability and ‘enterprise’ voice quality sound.

Battery life

Logitech literature states ‘upto’ 15 hours of talk time from a full charge. On three attempts I could only squeeze just short of 10 ½ hours from the device.


Interestingly I once blogged about another Logitech device for Lync, and while im writing this review, that same scenario and thoughts are echoing in my mind. Like the other device review I cant help but think that again Logitech has over engineered the P710 device to the point where some features are pointless. Also to the fact that its had a determent on the quality of some of the main key areas within the device. For example the sound quality is good, but the sound and mic simply aren’t up to the task of what a mini speaker should do. Both are quiet and poor. Also having no usb dongle and relying on the laptops Bluetooth stack is wrong and I know in many companies (Public sector), these devices wouldn’t be allowed to be used for Lync voice due to how easy ‘eves dropping’ can take place by mirroring the Bluetooth stack signal.

My biggest shock though is the price?! At £129GBP it’s the almost the most expensive of all the speaker devices and in opinion not worth the price tag it comes with.

Link –

RRP – £129.00




Finally the last of the group the Sennheiser SP20


The SP20 is the new device to the speaker market and in contrast looks very much a modern device, AND its= the only device out of the speaker range not to be made from plastic, which is refreshing. The shape is circular and made of composite metal.

Carry ability’ and Quick-fire use

This device is the slimiest of the group but weighing in at around the same weight and the other speakers. It also comes complete with the neoprene case and has two cables for connection. One being a USB cable for Lync connectivity, and the second is for Aux connection to a mobile device.

In the quick-fire tests the SP20 scored well with seamless connectivity and within seconds from the connection was able to make/take a lync call (No driver download). Equally on testing the secondary AUX wire on the quick test, simply plugging in the AUX cable into my iPhone made instant communication through the speaker.

Speaker sound and decibel reading

Excellent sound quality through the speaker and it scored the highest in the all tests including the loudness decibel test from 10ft. This being 91 decibels set at the max volume.

One party trick the SP20 does have over its rivals is the ability to press the centre button for 5 seconds to active the ‘music’ mode on the speaker which in turn makes the speaker produce much richer tone and also more sound output (98 decibels). I’ve used my SP20 within my home office for listening to music while working and not once have I thought its was dull and poor quality.

Mic’ usage and decibel reading

Like the sound quality using the speaker to talk through from 10ft away saw the highest decibel readings from all four tested devices and the reading was up at 67 decibels on average.

Technology features

This is where it gets tricky. The sennheiser comes with the least amount of tech features. But the ones it does have is does well, and this is something we said before about Sennheiser products.  Do the simple stuff well. <less is more>

The SP20 and the SP10 devices don’t support Bluetooth?? Now is this an oversight? Speaking with the project group at Sennehiser prior to writing this post, we discussed the lack of Bluetooth capability and it was confirmed it wasn’t included by design into the device as it was felt this feature isn’t really needed is such a device and it has the usb and AUX cabling.. Do I agree? No…  Many times in meeting with 10/12 people sitting round a long table has a mini speaker been used’ using the Bluetooth feature with the device getting passed down the table to the speaker. Before people jump and tell me this isn’t the correct way to use such a device, this is real life and this is what happens in real life. People by nature, and combined with a  lack of understanding come to meetings or book meetings rooms ill equipped with devices. This is a fact of life. So coming back to the SP20 having no Bluetooth feature I think will trip the device up along the way, and I think at version ‘v2’ build of the device we could/might see a Bluetooth chip embedded inside. (I hope so anyway)

Another tech feature is the ability to have a conference call through Lync and also migrate ia call which you might aleady have on your mobile by plugging the mobile phone into the aux cable, from there you can bridge the mobile call into the Lync. This is a really nice feature and one which is a game changer, that all other devices can’t accomplish.

Lets not forget the stereo sound boost button, and the SP20 is the only device out of the four which makes reference to being a music speaker as well.

Battery life

Battery charging of the SP20 is fast with 2 hours charging giving you 20 hours of Music Playing (don’t forget to use this with Lync you will be connected via the usb cable), meaning the only time you would use the battery is for music and mobile phone conferencing. That said I’m getting 18 hours of music playing from the device per charge.


I love this device for the style alone, and its good to see someone break away from the mundane black plastic approach to devices. In my opinion on the style and look its worth the £99 price tag !!

On a more serious note,  the SP20 is a great device and along with the Jabra 510 will be something I will carry in my kit bag. Its also worth noting that with all Sennheiser Lync devices they are all tested and certified for ‘Lync for Mac’ as well.

Finally a note to Sennheiser, if only you had included the Bluetooth option to the device the SP20, you would had been my first 5 star rating.

Link –

RRP – £129.00




———————-All devices summary and unbiased view————————————

So there we have it, the complete 4 device review. i think all the devices offers something to the UC market albeit, Device mobility, Sound quality, Connectivity features. But for me i would be simply looking at a good connection and good sound input and output as this is what you want from a speaker device right.?

So to summarise and really recommend a device to use and also one i would recommend to customers i would have to go with the Sennhieser SPxx range. Although i do like the Jabra 510+ device i just don’t see it in the same light as the SP20 for build, battery life and ultimately the sound quality. 

In order of recommendation

1st Sennheiser SP20/10

2nd Jabra 510/+

3rd Logitech P710 & Plantronics Calisto 620



Thanks for looking.

Microsoft Lync for Mac – Contact Searching, unable for auto find or users



For this review I’m going to concentrate on another oddity with Lync for Mac, this time its around the issue of when you try and search for a colleague within the Lync for mac client you don’t actually find anyone unless you put their absolute path into the search field. i.e.: why is this..??

In version 14.04 onward of the Lync for Mac client another bug was introduced this it is around the contact.db/idx files not updating. or if you’ve installed a fresh install of Lync for mac 14.04 or higher you won’t even get the contact.dc.idx files.

these are located library/caches then folder called

so what is the bug, ?

This issue is around the fact the Lync client policy is set for do the following on the address book download – filedownloadwebsearch (do a get-csclientpolicy in powershell)

The Lync for mac does try and attempts to do the file download but errors within itself and stops trying to do anything else, and it fails to even try to use the web search option.At the time of writing there isn’t any fix from Microsoft of this bug and the only ‘workaround’ is the following.

Create a new client policy for mac users called something like – MacUsers?. to create a client policy check any policies associated with your users and mirror the settings apart from the address book download as you need change this to be Websearchonly.


New-CsClientPolicy -Identity MacUsers -AddressbookAvailability WebSearchOnly -DisableCalendarPresence $True -DisablePhonePresence $True -DisplayPhoto "PhotosFromADOnly"

Once you’ve created your new policy grant these to your Mac users and your searching will start to work successfully.

Microsoft Lync for Mac – Client Crashing



Due to my work computer being a Macbook Pro (my choice), i use the MS Lync client called Lync for Mac. Unfortunately this client isn’t as polished as its windows equivalent and the feature set shortcomings are abundant.

Apart from the shortcomings which i will gloss over ;), there is a few fundamental bugs still in the Lync for Mac software.

In this post i will talk around one of the major ones which i think will probably effect most mac users. Lync unexpectedly crashing without notice or even input.

So based on alot of digging around what is causing this unexpected behaviour. The error log proves useless, and provides little information on whats happening.

After speaking with MS on this issue, the top and bottom of it is the fact something at the time of the crashing is plugged into either the thunderbolt port or a USB port. Within the Lync for mac code is a bug which for one reason or another doesn’t like the fact external peripherals being present on the mentioned ports.

So what is the resolution to this.?

Simple really, upgrade/patch your Lync for Mac to version 14.07.02 firstly, then apply the hot fix from Microsoft HERE, this will put the version to 14.07.02 (140123). NOTE: This hot fix isn’t readily available yet, and its by request of MS.

Once you’ve updated and installed the hot fix your wows of the Lync for Mac client are over. (well for time being)

Lync 2010 and 2013 – Sennheiser’s ‘new kids on the block’



So you thought your headset couldn’t get any better. Well think again… Over the past couple of months or so I’ve had the privilege of trialling Sennheisers new mobile desk headsets named respectively as MB Pro 1 (mono ear) and MB Pro2(Dual ear). 


So what’s new about these headsets and why haven’t I touched my other accustomed to headsets since these were placed on my desk. (Three of my current desk headsets being left behind are the Jabra Pro 9475, Logitech H820e, Sennheiser’s DW office). There are a number of reasons why I haven’t given the others a second thought, these being in no particular order.


Both the MB Pro 1 and 2 are bluetooth headsets with a difference, both feature a full high build quality headset in both single and dual eared formats. Connectivity back to the PC/Laptop is via a USB bluetooth dongle meaning full wideband HD crystal clear audio. The beauty of this headset is that you can lift the laptop off the desk and leave the dongle in and continue your call on the move.

While at your desk, the headset comes complete with a streamlined but durable charging stand, and like other headsets from Sennheiser it features the usual off/on hook answer/hang up capabilities.

Audio Quality

As we have come to love with the Sennheiser range both for UC and commercial consumer devices, Sennheiser’s moto on never compromise on the audio quality again shines through with the MB Pro1 and 2. The sound clarity is as good as its bigger brother the Dect DW office. However the dual ear’d MB Pro 2 has a neat trick up its sleeve which I’ve detailed in point 5 below. ;).

The boom arm is a nice length even for my elongated head. The mic itself is covered in a noise cancelling formed foam endpiece while the ear piece is very confirmable and leather.

Battery Life and Bluetooth capabilities

Lets start with the battery life first. Ive been finding it lasts around 15 hours on talk time which i think for a battery operated device is quite well. I would have no issue in using this headset on a customer site knowing full well i have enough charge to last the day. One annoying aspect I’ve found though is when the device is running out of battery they beep in your ear at regular intervals, and when your on a conference call like i was when this happened it does become quite annoying and irritating. These mobile devices aren’t unique to the annoying beeping other vendors mobile devices (Jabra motion, Plantronics Legend etc etc) all follow the same characteristics of beeping when low on battery. To this point i welcome the day when a headset is able to simply tell me the minutes left instead of beeping to me.

Bluetooth Capabilities. As with all bluetooth devices a user shouldn’t expect its range to be within the dect headset metrics of 100+ metres of range. With the MB Pro’s the range you will find is a maximum of 80foot from the base unit. I personally think this would be enough for a ‘normal’ user, yet if you are looking a receptionist type headset i would suggest something which would allow for a extensive range.

 Noise cancelling reduction technology

The noise cancelling capabilities are exceptional, as mentioned earlier in this posting you simple don’t hear background noise even in loud call centre type open offices.

In Room ambiance sound (Sennheiser call this the room experience)

So what is Room ambience ?  this is a new feature which is prominent in the MB Pro 2 dual ear’d headset. On pressing the button on the right side of the ear piece for 5 seconds you will hear a beep then the people who you are in the call with become kind-of virtualised and they sound like you could be sat next to them in person. At first when i was told about this feature i  thought. ‘yeah ok’ but actually on using it i really like the experience especially when I’m in a multi person conference as it brings all the conference parties to the same sound level into your ears.

Personally i never use dual ear’d headsets as i don’t like to hear my own voice talking within my ear’s, plus i also think I’m shouting when i have a dual headset on. Now with the room experience feature, the headset simulates for talk through meaning that i actually hear my own voice at the same audible level as the rest of the people.

In truth i love this feature and I’ve used the dual ear headset a lot more than the single ear’d variant.

 Quality Stereo music play through.

Again the MB pro 2 comes with the full stereo option allowing for playing of music from your computer or from the paired mobile device. The stereo sound is great quality for a device which isn’t a consumer device. Also while playing music, it allows for instant pause when a call presents, then on hang up of the call the music starts again. again a really nice feature.

 Pro’s and Con’s

For me the pro’s without doubt out way the cons. The features i think set these headsets apart from other similar devices i.e.: Jabra 935 is the ability to be more mobile while working at a desk in the office whereas the Jabra 935 has the bluetooth element built into the charging station meaning its a fixed device. Also the room experience of the MB Pro2 is a really nice feature and i would recommended people to try. Audio quality goes without saying really, plus the battery life of 15 hours is unheard-of in a  mobile headset

As for the con’s there is only one which i think Sennheiser could have done better with.

This is the requirement to have two free USB ports for the MB Pro range, with USB ports being a premium on many laptop devices now to which these headsets are aimed at. Utilising two USB ports for me is criminal. For your awareness, One USB is required to charge the headset while on the docking stand and the other one if for the bluetooth dongle. Personally i would have liked to seen a single USB requirement with some sort of hybrid connector which could have accepted a charging cable with the bluetooth dongle built into it or tethered in someway. If you are stuck for usb ports another option i guess would be to power the charging unit via a wall socket plug instead of a computer USB

Scoring and pricing

Based on my testing of both headsets including the features they offer, i would say they both score a firm high 4 stars, missing out of the last star due to the USB considerations detailed about.

I would have as a guess on the higher end of £190 GBP rrp for the single ear MB pro1, and £200+GBP rrp for the dual ear MB pro2


These headsets are available now.!


Overall, i think Sennheiser has made a couple of great UC headsets which differentiate themselves in an already saturated market of UC peripherals. The uniqueness of the ‘bluetooth/full headset’ mobile range at this moment is small and i can see many clients going for these headsets over the more expensive dect devices.

Link for more information on the devices can be found


Microsoft Lync 2010, 2013 for Windows and Lync 2011 for Mac tested and compatible