Disable email signatures in Outlook Web App (OWA)

About this article

By default, users are allowed to create and modify their own email signatures in Outlook Web App. To prevent this, a policy can be created, which disables this feature for all users. This article will teach you how to do so.

Sections in this article:

• Creating the policy
• Disable auto-adding user signatures
• Related Articles

Prerequisites

Creating the policy

      1. Navigate the the "Exchange admin center".

      2. Click the "permissions" tab.

      3. Select the "Outlook Web App policies" tab.

      4. Add or edit the policy assigned to the users where the feature should be disabled 

      6. In the dialog box, select the "features" tab

      7. Uncheck the "Email signature" option 

      8. Click "Save"

Note

Note

Disable auto-adding user signatures

In case users have already added a custom signature, following the above steps will not disable the existing signature from being inserted by Outlook, only disable the access to the feature. To disable the automatic adding of user signatures the following PowerShell script can be executed to automate the process.

• Connect to Exchange Online PowerShell
• Run the following script to disable the auto-adding feature for all users:

$mailboxes = Get-Mailbox -ResultSize unlimited
​$mailboxes | foreach { Set-MailboxMessageConfiguration -identity $_.alias -autoaddsignature $false }

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