CRM 2011 does not work after March updates on the client

https://community.dynamics.com/crm/f/117/t/230126?pi51685=5#responses

Lync and Skype powershell scripts

https://blogs.msdn.microsoft.com/canberrapfe/2015/09/22/your-skype-powershell-cheat-sheet-useful-powershell-commands-you-can-run-in-skype-for-business-2015-and-lync-server-2013/