So I have completed a month in Exchange and I noticed this new KB. (http://support.microsoft.com/?kbid=555854)
It actually looks quite good. It provides a whole wealth of links that will help you in the process of upgrading Exchange 2000/2003 to Exchange 2007. It has a number of sections including:
- Prior to upgrading the current system to Exchange 2007, some precautions and considerations must be taken
- Post Upgrade Actions, Troubleshooting, and Recovery
- Known issues
It actually looks like quite a good resource, or a place to start before you put the error message in google!