How to renew Certificate on the Office Web App Server also known as WAC

Some day the certificate for the Office Web App Server will expire.
Can this be done by useing IIS Manager to change this or is Powershell our friend again?

The secret update on Lync 2013 and SQL Cluster

In the last few days, Microsoft has done some changes in what they support when it comes to SQL Server.

Lync Server 2013 supports the use of either SQL mirroring or SQL clustering for each Lync Server database. You can easily set up SQL mirroring with the Topology Builder tool in Lync Server 2013. For SQL failover clustering, you must use SQL Server deployment tool.

Lync 2013 and SQL Confusing..What is recommended

If you read the documentation for Lync 2013, you will there find out that when it comes to the SQL part, that it can be confusing.

Lync 2013 roster

Finaly its here. The trafic roster for Lync 2013.
http://windowsitpro.com/lync/lync-server-2013-protocol-poster