My migration was from a Windows 2000 DC running Exchange 2000. I did a swing migration of the domain okay and the SBS2003 server is running with all the user accounts and domain information working fine. During this process I followed in the guide from http://www.sbsmigration.com
about shutting off the Exchange AD functions of the 2000 server.
I now have the problem of when I copied over the databases to the new server and try to mount the store, it gives me the DN mismatch error. It states:
"The information store could not be loaded because the distinguished name
(DN) /O=domainname/ou=FIRST ADMINISTRATIVE GROUP/cn=RECIPIENTS/cn= of message database "First Storage Group\Mailbox Store(servername)" does not match the DN of directory /O=domainnetbiosname/OU=FI
RST ADMINISTRATIVE GROUP/CN=RECIPIENTS/CN=."
So I ran the LegacyDN utility and told it to change the organization from domainnetbiosname to domainname. The changes took, but then I could not start the IS service at all. I then changed it back and the service started, but the stores could not mount.
I looked at the KB article from Microsoft here: http://support.microsoft.com/kb/280652
I also looked at the KB article here:
I did the ldife utility and it processed 9 entries that needed to be changed in ADSIEDIT. The problem is, the article addresses changing the name of the First administrative group, but it looks as if the name of the First administrative group is the same, it's just the organization name that seems to be causing the problem (the previous IT guy for some reason named the domain domainname.com but the netbios name as a different name.)
I'm a bit lost on what I can do next. I can't run exmerge because the previous Exchange no longer responds as it has been removed from AD entries. If I can just get this to work, my migration should be done.
I hope someone can point me in the right direction.