Prerequisites for Restoring an Exchange Information Store Backup

If you need to recover from Exchange mailbox database corruption, you can use an Exchange Information Store backup to do so.

Before you try to restore, consider some prerequisites which must be met in order for the restore to be successful:

1. You need free disk space equal to at least twice the size of the mailbox database you plan to restore (half of this is for temporary files and the other half is the restored copy of the mailbox database).

2. If you want to restore back into production, you have to restore back to an Exchange server on the same domain as the original server.

3. You may be able to restore to a different server than the original, but it requires some preparation.

4. If you plan to restore to a recovery information store, you need to create it first.

Once you have verified these requirements are met, you can begin the restore.