Not able to restore mail to target Mailbox in On-premise Exchange

[Kiranpn]

Hi Team,
We are not able to restore the mail on targeted mailbox (On-premise Exchange server).
After we specify "CAS server" in Restore Wizard and selecting "Restore to the original folder", we are getting following error:
"Failed to open mailbox: test@test.com
Failed to access mailbox.
The request failed with HTTP 401: Unauthorized."

Regards,
Kiran

[Mildur]

The user, which is used for restoring the mail items, needs full access for the target mailbox.
If you have that configured, and it‘s failing again, please Open a support case.


Edit:
The user account from this step:

[Kiranpn]

Thank you, Mildur.
We have resolved it with your solution

Regards,
Kiran Pradhan

[Mildur]

Your welcome