DB errors after lyncserverupdateinstaller.exe is run

Situation

You have recently updated Lync Server 2010 to the latest Cumulative Update and you are having issues that appear to be DB related.

Possible Fix

It is entirely likely that you may have missed updating your databases as required.  This used to be a separate download.   Now that the lyncserverupdateinstaller.exe is available (see this MS KB) I have noticed that sometimes people forget to update the databases which is a separate step. 

AFTER you run the lyncserverupdateinstaller (remembering to do outside in methodology), here is what you need to do, by type of database environment:

If Enterprise Edition Back End Server databases are not collocated with any other databases, such as Archiving or Monitoring databases, at the command line, type the following:

Install-CsDatabase –Update –ConfiguredDatabases –SqlServerFqdn <SQL Server FQDN>

If Enterprise Edition Back End Server databases are collocated with other databases, such as Archiving or Monitoring databases, at the command line, type the following:

Install-CsDatabase –Update –ConfiguredDatabases –SqlServerFqdn <SQL Server FQDN> -ExcludeCollocatedStores

For Standard Edition, type the following:

Install-CsDatabase –Update –LocalDatabases

YMMV