SCCM Highlander

If you have an application that cannot be installed due to an existing install that has been broken in some way, try running the following command as a last resort:- msiexec.exe /fvecmus The command allows the MSI to install over the top of the old application that is stopping the install from completing.

The following error is displayed when launching Skype for business       Can't sign in to Skype for business – The server is temporarily unavailable. If the problem continues, please contact your support team. This issue maybe caused (in my case) due to the firewall blocking sipfed.online.lync.com:5061 https://technet.microsoft.com/en-us/library/gg398833.aspx You can test to see if the port is open or closed using telnet. A successful test will look as follows:-