Exchange store can't mount afte schema upgrade on PDC

We have a 2003 domain called DomainA. We build a new 2008R2 DomainB and added it to the DomainA forest.
We ran adprep /forestprep on DomainA with out errors.
The upgrade went well, but now our exchange box 2003, cannot mount its stores.
DrakkeenAsked:
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GiladnCTO/CIOCommented:
look at the eventvwr for related error..
did you try to reboot the 2003 machine ?
DrakkeenAuthor Commented:
Yes I have rebooted DomainA, and the Exchange server.

In the event log I get this error
The MAPI call 'OpenMsgStore' failed with the following error:
The Microsoft Exchange Server computer is not available.  Either there are network problems or the Microsoft Exchange Server computer is down for maintenance.
The MAPI provider failed.
Microsoft Exchange Server Information Store
ID no: 8004011d-0526-00000000
GiladnCTO/CIOCommented:
did you dismount the store ?
first try to re-start the server , if store still cannot mount try c:\program files\exchsrvr\bin\eseutil /mh "x:\exchange database folder\name of Exchange database.edb"
see "repair count attribute" and report back..
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DrakkeenAuthor Commented:
No, noticed after that it was not mounted.
Restarted server, still can't mount.
Repair count = 0
DrakkeenAuthor Commented:
turns out was a mismatch SID and fix was microsoft patch KB930241

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R--RCommented:
Please check if the database is in clean state by running eseutil /mh
Check if the exchange services are running.
check if there is any event log related to MSexchangedsaccess and ESE.
Glen KnightCommented:
This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
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