Category Archives: Uncategorized


Skype for Business: Cannot Synchronize Address Book

Recently we gained some questions of our customers regarding an odd error message. Error Recently they upgraded the client software and now seeĀ an exclamation mark in the client, stating “cannot synchronize address book”. This happened when upgrading to Office 2016; in Lync 2013 (with or without Skype for Business “skin”) everything was normal. You can…

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Skype for Business Server 2015 CU1 available

Skype for Business is only available for nearly two months now, though the first Cumulative Update is already out! Version bumps up to 6.0.9319.55(CU1 / June 2015), from 6.0.9319.0 (RTM): Issues that get fixed with this CU: KB 3063353 June 2015 cumulative update 6.0.9319.55 for Skype for Business Server 2015 and Unified Communications Managed…

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Federation stops working after enabling a HostingProvider with “EnabledSharedAddressSpace” turned on

This could be, for example, Lync- or Exchange OnlineĀ / Office365. Recently, federation broke when implementing “voicemail in the cloud” with Microsoft’s Exchange Online. Microsoft Exchange was configured in Hybrid mode, all successful and operational – users could be moved back and forth and use either Exchange on-premise or Exchange online. Unified Messaging was already enabled…

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Back again!

It might be a while since my last blog item. This is mainly because of my busy life: both at work and at home. In my private life, I now have two wonderfull kids. Ofcourse I like to spend time with them, which causes less time for…updating my blog for instance. Secondly, I recently changed…

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Lync Server Installation Error: Prerequisite installation failed – Wmf2008R2

On some occasions, when you try to install a Lync Server on Windows Server 2008 R2, you’ll receive an error message stating that one of the prerequisites failed to install: Wmf2008R2. It was already known that sometimes this installer needs a reboot; now it is failing completely. The installer fails with exit code “3”; The…

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