Outlook 2011 for Mac: Can't make class signature

Problem

You get this error message when clicking 'update all' in your Xink app for Mac. In this case, your Outlook identity needs to be rebuilt.

This will also show as missing signatures, where all your signatures are gone.

Solution

To do so, follow the guide in this Microsoft KB article:

http://support.microsoft.com/kb/2360509

It is not something we can help further with, so you need to contact your IT administrator or do it yourself.