Before you can become a delegate, another person must grant you delegate access to a
Microsoft Exchange accountAn account managed by Microsoft Exchange Server. Microsoft Exchange
accounts are used by organizations with many users. They make it possible to synchronize e‑mail, calendars, and contacts between multiple computers.. You may receive an e-mail notifying you that you have delegate access. Then, to access the items that you are a delegate for, you must add the person who granted you access to your People I am a delegate for list. When you want to stop being a delegate for someone, you need to remove the person from the list.
Do any of the following:
Become a delegate for someone else
Stop being a delegate