Assigning Full Access to Service Accounts for Exchange Online (Through On-Premises Active Directory)

Applies to: Office 365 with Exchange, User Mailbox, All Public Folders

In an Office 365 with Exchange environment, you must configure the Exchange Online service account to discover, archive, clean up, and restore data for user mailboxes, group mailboxes, and all public folders.

  • Local System Account (Windows user)

Before You Begin

The Office 365 with Exchange (Exchange Online) administrator account must have the following service accounts configured:

  • Exchange Online service account, which must meet the following requirements:

    • Must be an online mailbox or a shared mailbox.

    • Must be created in Azure AD only.

    • Must have either the Exchange administrator role or the global administrator role assigned so that the Exchange administrator or the global administrator can discover and back up Office365 group mailboxes. For more information, see Assign admin roles in Office 365 on the Microsoft documentation website.

    • If you use more than one access node, the service account must have local logon rights.

    • For public folders, you must have owner permissions at the root level and the sub-folder level. Convert the shared mailbox to a user mailbox, assign assign the owner permissions, and then convert the mailbox back to a shared mailbox.

    • For the Exchange Online service account, a license is not required. Convert the user mailbox to a shared mailbox, and remove the Office 365 license for the Exchange Online service account.

  • Local system account (Windows user), which must meet the following requirements:

    • Must be a member of the local administrator group.

    • Must be a domain user.


  1. Open Windows PowerShell and create a remote PowerShell session to Office 365 with Exchange.

  2. To assign impersonation and view-only recipient permissions, type the following command:

    New-RoleGroup -Name "ExchangeOnlineBackupRoleGroup" -Roles "ApplicationImpersonation", "View-Only Recipients" -Members serviceaccount1,serviceaccount2


    • ExchangeOnlineBackupRoleGroup is a unique name for the new role group.

    • serviceaccount1 and serviceaccount2 are Exchange Online service accounts.

What to Do Next

Run Application Check Readiness for the Exchange Mailbox Client.