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Unable to uninstall Exchange during SBS 2003 to 2008 Migration

This seems to be a fairly classic problem, but having virtually completed my migration from SBS 2003 to SBS 2008 I am unable to uninstall Exchange due to the following error:

Setup encountered an error while checking prerequisites for the component "Microsoft Exchange":
0x80072030 (8240): There is no such object on the server.


I have checked out http://support.microsoft.com/kb/283089 and other related  articles.
The only mailbox reported by ADUC advanced find for "ExchangeHomeServer ends with [SBS2003 servername]" is a SystemMailbox{60655F04-E77B-4EE0-BE51-4CF36A14A042} which I gather shouldn't cause problems but sometimes does.

Can someone talk me through what I should do next?
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texan_gerbil
Asked:
texan_gerbil
1 Solution
 
Shreedhar EtteCommented:
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Cris HannaCommented:
Philip Elder, one of the other SBS MVPs has published an excellent migration guide with details on a number of steps that may be causing your exchange issues...I would print out the page and review each and every item to see if you might have missed something
http://blog.mpecsinc.ca/2009/06/sbs-2003-to-sbs-2008-migration-guide.html
 
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texan_gerbilAuthor Commented:
Thanks Shree for that link. Following the article's link to http://support.microsoft.com/kb/833396 allowed me to hack my way through the registry and complete the migration. Old server is now off and new one doesn't seem to have thrown a fit yet!

Thanks also for the other link - a useful extra resource which I wish I'd had earlier in the process.
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