Creating a dedicated archiving COS makes it easy to create archive mailboxes that are configured the same. You create the COS and on the Class of Service > Archiving page enable the archiving feature.
The Account data template and the Account name templates are used to create and mange the naming scheme for archive accounts.
Account Date template sets the date format used in the name template. The default is yyyyMMdd. Adding the date to the account name makes it easier to roll off older data from the system to backups.
Account Name template sets up how the archive mailbox name is created. The default value is ${USER} ${DATE}@${DOMAIN}.archive. The archive account address would be like this example: user-20070510@example.com.archive. If you change the default value, you must use syntax that creates a valid email address. We recommend that you add .archive to all archive accounts to create archive mailboxes in a non-routable domain to prevent spoofing of the archives.
After you enable Archiving on the COS, create an archive mailbox and assign the COS.