When user want to set Delegates for a user of a mailbox, the user meet below error.
Step 1:
Step 2:
Step 3:
Error Message:
Solution:
- Check user mailbox location, local mailbox or office online mailbox.
- Check mailbox location. Method is same as
previous step.
- Check GrantSendOnBehalfTo property of this mail box.
- Add user permission.
Additional:
Remove user permission.