I installed a Windows SBS 2003 server in place of a Windows 2000 server. Rather than do a migration, I manually configured the new SBS server with the same computer name as the old server, then migrated clients over.
I used the ExMerge utility on the old 2000 server to export mailbox contents to a PST file. When I tried step 2 of ExMerge on the new 2003 server (importing the PST file), I get the following error in the log file:
Error configuring message service (MSPST MS) (UNKNOWN ERROR) (CMapiSession::CreateEMSPSTProfile)
A couple more notes:
1. The file is not marked as Read-Only
2. The user name is the same on the source and target exchange server.
3. The only difference that I know of is that the old server was MYSERVER.COM, while the new server is MYSERVER.LOCAL.