You discovered that messaging administration in Office 365 is extremely powerful. You can grant a user the right to access another mailbox. You can grant another the right to handle your calendar; etc.
Most advanced administration tasks require going through PowerShell. Way too complex for the average Joe.
We can help you for FREE to do such advanced administration tasks.
To send us such a request, activate our special delegation at http://delegate.valor.pro. Then contact us with your request and we will try to help.
Good luck.














