Enable or Disable Outlook Web App for a Mailbox

Applies to: Exchange Server 2013, Exchange Online

Topic Last Modified: 2012-11-14

You can use the EAC or the Shell to enable or disable Outlook Web App for a user mailbox. When Outlook Web App is enabled, a user can use Outlook Web App to send and receive email. When Outlook Web App is disabled, the mailbox will continue to receive email messages, and a user can access it to send and receive email by using a MAPI client, such as Microsoft Outlook, or with a POP or IMAP email client, assuming that the mailbox is enabled to support access by those clients.

Note:
Support for Outlook Web App and MAPI, POP3, and IMAP4 email clients is enabled by default when a user mailbox is created.

For additional management tasks related to managing email client access to a mailbox, see the following topics:

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 "Client Access user settings" entry in the Clients and Mobile Devices Permissions topic.
For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard Shortcuts in the Exchange Admin Center.

Tip:
Having problems? Ask for help in the Exchange forums. Visit the forums at: Exchange Server, Exchange Online, or Exchange Online Protection.

What do you want to do?

Use the EAC to enable or disable Outlook Web App

In the EAC, navigate to Recipients > Mailboxes.
In the list of user mailboxes, click the mailbox that you want to enable or disable Outlook Web App for, and then click Edit .
On the mailbox properties page, click Mailbox Features.
Under Email Connectivity, do one of the following:
- To disable Outlook Web App, under Outlook Web App: Enabled, click Disable.
  
  A warning appears asking if you're sure you want to disable Outlook Web App. Click Yes.
- To enable Outlook Web App, under Outlook Web App: Disabled, click Enable.
Click Save to save your change.

Note:
You can enable and disable Outlook Web App for multiple user mailboxes by using the EAC bulk edit feature. For more information about how to do this, see the "Bulk edit user mailboxes" section in Manage User Mailboxes.

Use the Shell to enable or disable Outlook Web App

This example disables Outlook Web App for the mailbox of Yan Li.

	Copy Code
Set-CASMailbox -Identity "Yan Li" -OWAEnabled $false

This example enables Outlook Web App for the mailbox of Elly Nkya.

	Copy Code
Set-CASMailbox -Identity Ellyn@contoso.com -OWAEnabled $true

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

How do you know this worked?

To verify that you’ve successfully enabled or disabled Outlook Web App for a user mailbox, do one of the following:

In the EAC, navigate to Recipients > Mailboxes, click the mailbox, and then click Edit .
On the mailbox properties page, click Mailbox Features.
Under Email Connectivity, verify whether Outlook Web App is enabled or disabled.

Run the following command in the Shell.
Copy Code
Get-CASMailbox <identity>
If Outlook Web App is enabled, the value for the OWAEnabled property is True. If Outlook Web App is disabled, the value is False.