A mailbox group consists of user mailboxes to which you want to assign the same archive settings. For example, you can add a single user to a mailbox group, or you can add the entire Exchange organizational unit to a mailbox group.
In the Archive job properties, in the Exchange settings, Backup Exec applies the archive settings sequentially to each mailbox group in the list. The archive settings of the first mailbox group that a mailbox is found in are applied to that mailbox.
The order of the mailbox groups is important. You should arrange the mailbox groups that have specific selections of users, groups, and distribution lists at the top of the list. Arrange the mailbox groups that contain the least specific selections at the bottom of the list. For example, a mailbox group that contains specific users should be listed before a mailbox group that contains a user group. In turn, a mailbox group that contains a user group should be listed before a mailbox group that contains the whole Exchange organizational unit. For example, you want to ensure that the correct archive settings are applied to the users that are in multiple groups.
You would arrange the following example mailbox groups in the order listed:
You can select the following items to archive in a mailbox group: