The application can protect the number of mailboxes that does not exceed the limitation of the current key. If this number is insufficient, you can alternate protection between mailboxes. To do so, you have to move to unprotected storage the mailboxes that need no protection. By default, the application also protects all public folders of the mail server. You can remove protection from public folders if you think that scanning them would be redundant.
By default, the application protects those storages of mailboxes and storages of public folders on the protected Microsoft Exchange server, which already existed at the time when the application was installed, as well as all newly-created storages.
To configure the protection settings for mailboxes and public folders:
The Protected mailbox storages and Protected public folder storages lists contain repositories of mailboxes and shared folders of the protected Microsoft Exchange server.
If the application is running in a DAG of Microsoft Exchange servers, these lists enumerate mailbox storages and public folder storages on all the servers within this DAG.
When viewed from a profile, the Protected mailbox storages list shows only the protected storages of those Microsoft Exchange servers on which Anti-Virus for the Mailbox role is deployed.