Restoring an Exchange Server 5.5 Directory Store to
an Exchange Server other than the original is not supported; only
Information Store data can be restored to a different computer.
The Exchange System Attendant service must be
running on the target server.
If you are restoring
Exchange data to more than one Windows computer, the System
Attendant service must be running on each target computer.
The target server must have access to the original
Security Account Manager (SAM) information If you are restoring the
If the recovered server
does not have access to the SAM information from the original
domain, and the Directory Store is restored, none of the Exchange
data is accessible after the restore. This is because the Exchange
Directory uses SID (Security Identifier) information for
authenticating access to objects and the restored SID information
will not match SID information from the SAM in the new domain.
The Directory and Information Store services are
stopped when the corresponding stores are restored. Users cannot
access them until the restore is complete and the services are