Office 365 (Outlook Client for Windows) - Sharing and Permissions (General Overview)

This article describes the types of sharing and permission levels in Outlook.

Sharing in Outlook

Outlook allows two types of sharing:

  1. Permissions: This type of sharing allows selected others to access your mail, calendar, and/or contacts but does not allow others to send email or create meeting invitations as you. When setting up permissions, you can determine exactly how much access a given person has.
  2. Assigning a delegate: Delegation allows another specified individual to act on your behalf. Use of this functionality should be done with caution as your delegates can take actions with your e-mail, calendar, and contacts as if you were doing so. For example, if user A assigned user B as a delegate and gave them “Send As” permissions, any message that User B sends from this mailbox will appear as if it was sent from user A. A slightly more restrictive option is to give the delegate “Send on Behalf” permissions. In this scenario, the From address in any message sent by the delegate indicates that the message was sent by the delegate on behalf of the mailbox owner.

Office 365 (Outlook Client for Windows) - Allow Someone to Manage Your Calendar and/or Email (Assign a Delegate)

Office 365 (Outlook 2013 / 2016 / 2019 for Win) - Manage Another Person's Calendar and/or Email (Act as a Delegate)

What are the various permission levels (non-delegate)?

Mail/Folder Permissions:

         Office 365 - (Outlook 2013 / 2016 / 2019 for Win) Share an Outlook Folder / Open a Folder That was Shared With You

Calendar Permissions:


Read refers to what a person can see in your calendar.


This set of permissions refers to whether or not one can create events in your calendar, and modify these entries. You can select more than one option at a time.

Delete Items


         Office 365 (Outlook Client for Windows) - Calendar Sharing

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