Managing email apps for user mailboxes

Enable or disable email apps for user mailboxes in Exchange Online

You can use the Exchange admin center (EAC) or Exchange Online PowerShell to enable or disable the following email apps for user mailboxes:

• Microsoft Exchange ActiveSync: Exchange ActiveSync is a client protocol that lets users synchronize a mobile device with their Exchange mailbox. Exchange ActiveSync is enabled by default when a user mailbox is created. To learn more, see Exchange ActiveSync in Exchange Online.

• MAPI: When MAPI is enabled, a user's mailbox can be accessed by Outlook or other MAPI email clients.

• Outlook on the web: When Outlook on the web is enabled, a user can use Outlook on the web to access their mailbox.

• IMAP and POP3: These are older email protocols that Exchange supports. When enabled, users can use email clients that support these protocols to access their mailbox in Exchange.

Note

Support for Outlook on the web and MAPI, POP3, and IMAP4 email clients is enabled by default when a user mailbox is created.

Tip

Outlook on the web is required for the Share to Outlook feature to work in Microsoft Teams and for the new Outlook.

What do you need to know before you begin?

• Estimated time to complete: 2 minutes.

• You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Mobile devices" entry in the Feature permissions in Exchange Online article.

• For information about keyboard shortcuts that may apply to the procedures in this article, see Keyboard shortcuts for the Exchange admin center.

Use the Exchange admin center to enable or disable email apps

1. In the EAC, navigate to Recipients > Mailboxes.

2. In the list of user mailboxes, select the mailbox that you want to enable or disable email apps for. A display pane is shown for the selected user mailbox.

3. On the General tab, under Email apps & mobile devices, select the Manage email apps settings link.

4. In the Manage settings for email apps display pane, set Outlook desktop (MAPI), Mobile (Exchange ActiveSync), IMAP, POP3 and Outlook on the web to Enabled or Disabled

5. Select Save to save your change. A message Email app settings updated successfully is displayed. Select Close to exit.

Use Exchange Online PowerShell to enable or disable email apps

This example disables Exchange ActiveSync for the mailbox of Yan Li.

Set-CASMailbox -Identity "Yan Li" -ActiveSyncEnabled $false

This example disables MAPI for the mailbox of Ken Sanchez.

Set-CASMailbox -Identity "Ken Sanchez" -MAPIEnabled $true

For detailed syntax and parameter information, see Set-CASMailbox.