Dear be12,
thank you for your response. Exchange 2007 Management Tools were already installed. Here's what happened:
- When we only had an Exchange 2003 server, backup including restore of individual messages went well. On our backup media server, we had the Exchange 2003 System Manager installed.
- We installed an Exchange 2007 server. We installed the Exchange 2007 Management Tools on the same backup media server. Backup including restore of individual messages for both the Exchange 2003 adn the Exchange 2007 went well.
- After migrating to the Exchange 2007 server, backup of the Exchange 2007 still worked.
- Now, in order to clean up, we've removed the Exchange 2003 System Manager from the backup media server, since we no longer make backups of the Exchange 2003 server.
- Backup of our Exchange 2007 server still works, however, we can't restore individual messages any more. The error mentioned in the first post is displayed after every backup.
Can you help us on this one?