Assign Full access permissions to Exchange Online mailbox 5/5 (5) 3 min read

In the current article, we review how to add Full Access permissions to a specific mailbox in an Office 365 based environment.

The assignment of the “Full Access mailbox permissions” is a simple operation, that is implemented by using the Exchange Online web-based management interface.

The other half of the Full Access permission’s process is related, to the way that the user who has the permissions view the “destination Mailbox.”

In the second part of the article, we will review how Outlook and OWA mail client view a mailbox which the user has Full permissions on it.

Our scenario description

In our example, we would like to assign a user named – Chris, Full Access permissions on Frank mailbox.

After we provide the required permissions, we will need to verify the Chris can view Frank mailbox when he uses Outlook + OWA mail clients.

The required scenario of Full access permissions

Assigned Full Access permissions to the Exchange Online mailbox

To assign the required Full Access permissions, log in to Exchange Online admin center

  • On the left menu bar, select the menu – recipient (number 1).
  • On the Top menu bar, select the menu – mailboxes (number 2).
  • In the mailbox list, select + double-click on the specific recipient whom you want to assign Full Access permissions on his mailbox. In our example, the recipient who will “share his mailbox” with another user is – Frank (number 3).

Assign Full access permissions to Exchange Online mailbox -01

  • In the “Mailbox properties” window, select the menu – Mailbox delegation (number 1).
  • Scroll down to the “Full Access” section
  • Click on the plus icon (number 2).

Assign Full access permissions to Exchange Online mailbox -02

  • From the recipient list, select the specific recipient who will have the Full Access permissions. In our example, Chris is the recipient who will have Full access permissions on the Frank mailbox (number 1).
  • Click add -> (number 2).
  • Click OK (number 3).

Assign Full access permissions to Exchange Online mailbox -03

In the following screenshot, we can see that under the “Full Access” section, Chris appear as the user who has Full Access permissions on Frank mailbox.

  • Click Save

Assign Full access permissions to Exchange Online mailbox -04

How Outlook and OWA mail client view a mailbox which the user has Full permissions on it?.

After we have been complete the task of assigning the Full Access permissions, the next step is related to the way that the user who has the permissions can use for accessing the “destination mailbox.”

The “way” depends on the mail client that you use because Outlook client is behaving differently from OWA mail client regarding the subject of viewing the “destination mailbox.”

How to access your mailbox you have Full access permissions - Outlook

The Full Access permissions using a special feature named – Automapping.

The Automapping feature automatically the “destination mailbox” to the Outlook mail profile without any need for additional configuration.

In our example, after we assign the Full access permissions to Chris on Frank mailbox, Frank mailbox will be added automatically to the Chris Outlook mail profile.

In the following screenshot, we can see the when Chris open his Outlook mail profile, the additional mailbox was added to his Outlook mail profile.

How to access your mailbox you have Full access permissions - Outlook

How to access your mailbox you have Full access permissions – OWA

In case that a user has Full Access permissions to another user mailbox and he uses OWA mail client, he needs to implement a short procedure to add the “additional mailbox” to his OWA mail profile.

How to access your mailbox you have Full access permissions - owa-01

  • Right click on the “recipient name.” In our example, Chris

How to access your mailbox you have Full access permissions - owa-02

  • Select the menu – Add share folder…

How to access your mailbox you have Full access permissions - owa-03

  • In the search box, Active Directory the name of the recipient whom you want to add his mailbox.

How to access your mailbox you have Full access permissions - owa-04

  • Click Add

How to access your mailbox you have Full access permissions - owa-05

In the following screenshot, we can see the when Chris open his Outlook mail profile, the additional mailbox was added to his Outlook mail profile.

How to access your mailbox you have Full access permissions - owa-06


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Assign Full access permissions to Exchange Online mailbox
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Assign Full access permissions to Exchange Online mailbox
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In the current article, we review how to add Full Access permissions to a specific mailbox in an Office 365 based environment.The assignment of the “Full Access mailbox permissions” is a simple operation, that is implemented by using the Exchange Online web-based management interface.
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