Delegate permission to a shared mail box

Exchange Server Admin

1. Go to Office.com

2.  On the left side there's an icon tray and open Admin.

3. Now you're directed to Microsoft 365 Admin Center. On the left side click show all

4. On Admin centers section open Exchange

5. Now you're directed to Exchange admin center. On the left side of the window

 open the drop down list of recipients under it open Mailboxes

6. Now search the email that you want to delegate.

7. Open the email that you selected to delegate. After opening a small window will 

pop up on the right side of your screen and open Delegation.

8. Under "Read and manage (Full Access)" click edit.

9. Open +Add members

10. Search for the person you want to give full access to the email and click save.