Specifications

1.
2.
3.
4.
5.
6.
Assign the service account permissions on the Storage Groups on your Exchange Server.
Open the Exchange System Manager, click , and then expand your server.Servers
Right-click , and click on the Mailbox Store in the first storage group.First Storage Group Properties
Click on the tab, and add your backup service account to the section of the Security Group or user names Mailbox Store
; click on the backup service account name.Properties
In , turn on for both and permissions:Permissions for Exchange Backup Allow Receive As Send As