How To Disable OWA for all Users – Exchange 2010 / 2013

In this Exchange Server blog post, I will show you how to disable OWA to all users on Exchange 2010 / 2013.

Exchange OWA, or Outlook Web App, is a web-based email client for Microsoft Exchange Server.

It allows users to access their mailboxes from any web browser, making it convenient for users who are not at their usual workstations.

In addition to email, Exchange OWA also provides access to calendars, contacts, tasks, and other mailbox content.

This web-based client offers a similar experience to the desktop version of Outlook, making it a valuable tool for users who need to access their email on the go or from different devices.

If you need to disable OWA access for all users in your organization in one go or bulk, you can use Exchange Powershell.

Note: This process will work on Exchange Server 2016.

How To Disable OWA for all Users – Exchange 2010 / 2013

To disable OWA, open Exchange Management Shell (EMS) and type:

Get-Mailbox -ResultSize unlimited |Set-CASMailbox -OWAEnabled $false

To enable it back to all users, type:

Get-Mailbox -ResultSize unlimited |Set-CASMailbox -OWAEnabled $true

The change will happen immediately and be disabled or enabled on all mailboxes.

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