Because the CU3/CU4 database update is often forgotten, I made a little post about it.
In the KB article there is a little note, like in a employer contract, which is pointing out that there has to be an update installed on de the database.
This is the little note of the kb article.
Now we have to run the following code from the Frontend server in Lync 2010 Management Shell:
Install-CsDatabase -Update -ConfiguredDatabases -SqlServerFqdn <EEBE.Fqdn> -UseDefaultSqlPaths
Where <EEBE.Fqdn> is you’re frontend server when running the Standard edition and the SQL server when running in Enterprise edition.
There is is a very nice blog from Jamie Schwinn explaining the update of the database. http://waveformation.com/2011/09/06/lync-server-2010-cu3-database-update-explained/