Add the backup account to the Discovery Management role group and assign Application Impersonation permission to it.
Follow these steps:
- Add the required role and group using any one of the following ways:
Using Office 365 portal
- Log on Office 365 portal as an Administrator or with an account that has Global Admin permissions.
The ExchangeAdmin center page opens.
- Go to permissions and double-click Discovery Management from the Add drop-down.
The Discovery Management dialog opens.
Note: Member of the Discovery Management role group can perform searches of mailboxes in the Exchange organization for data that meets specific criteria.
- Under Roles, click + to add the ApplicationImpersonation role.
The Discovery Management dialog opens.
- Select ApplicationImpersonation from the Display Name drop-down.
Note: The ApplicationImpersonation role enables applications to impersonate users in an organization in order to perform tasks on behalf of the user.
- Under Members, click + to add the backup account as a member.
A dialog appears.
- Select the backup account from the Name drop-down and click OK.
The selected backup account is displayed under Members on the Discovery Management dialog.
- Click Save.
- Log on Office 365 portal as an Administrator or with an account that has Global Admin permissions.
Using Remote Powershell
- To connect to the Exchange Online tenant using remote PowerShell, refer to the link.
- Once connected, to add the backup account as a member of Discovery Management role group, use the:
"Add-RoleGroupMember" cmdlet
For example: Add-RoleGroupMember "discovery management" -member userName@domain.onmicrosoft.com.
- To assign application impersonation role to the backup account, use the:
"New-ManagementRoleAssignment" cmdlet
For example:
New-ManagementRoleAssignment Name: impersonationAssignmentName -Role:ApplicationImpersonation - User: "username@domain.onmicrosoft.com"
The ApplicationImpersonation role and Members group are added to the Exchange Online backup account.
Reference: https://support.arcserve.com/s/article/Arcserve-UDP-7-0-Documentation?language=en_US