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?
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.