How to disable default email signatures in mobile Outlook apps using Intune

Problem:

You would like to use Microsoft Intune to centrally disable default email signatures in Outlook for Android and Outlook for iOS for all users or selected groups of users in your organization.

Solution:

You can disable default signatures in both mobile Outlook apps by creating an app configuration policy in the Microsoft Intune admin center and applying it to the Outlook apps on mobile devices enrolled in Microsoft Intune.

Creating an app configuration policy

The process is the same for both Android and iOS and goes as follows:

1. Sign in to the Microsoft Intune admin center.
2. Go to Apps > Configuration, click Create, and select Managed apps (Fig. 1.).

Fig. 1. Accessing the app configuration policy wizard.

3. In the Basics step, provide an appropriate policy name (mandatory) and description. Next, click Select public apps (Fig. 2.).

Fig. 2. Creating a new app configuration policy.

4. In the Select apps to target pane, type outlook (Fig. 3., item 1) and click the Outlook versions for both the platforms (Fig. 3., item 2). The apps should appear under Selected Apps (Fig. 3., item 3). Finally, click Select to confirm your choices and close the pane (Fig. 3., item 4).

   Info

   If you’ve chosen to use only one mobile platform organization-wide, you don’t have to select both the Outlook versions but only the one that is appropriate for the mobile platform you use.

Fig. 3. Choosing the Outlook app versions for Android and iOS.

5. Click Next to go to the Settings catalog step. You don’t need to configure any settings here, so click Next again to continue.
6. In the Settings step, click Outlook configuration settings to expand the settings list. Locate the Default App Signature option and set it to No. This setting will be common for both mobile platforms. Finally, click Next (Fig. 4.).

Fig. 4. Modifying the Outlook configuration settings to disable the use of the default app signature.

6. The Assignments step allows you to define the scope of users for whom the default app signature in the mobile Outlook apps will be disabled. To assign the policy to group(s), click Add groups and choose appropriate Entra ID groups – once selected, they will be listed under Included groups (Fig. 5.).

   Info

   If you wish to allow users belonging to certain Entra ID groups to use default app signature in the mobile Outlook apps instead, you can exclude them from this policy by clicking Add groups under Excluded groups (see the bottom portion of Fig. 5.).

Fig. 5. Assigning Entra ID groups to the policy.

8. In the last step, Review + create, verify if all the settings are correct. If you’re fine with them, click Create (Fig. 6.) to save and apply your policy.

Fig. 6. Reviewing the settings and applying the policy.

Even though the policy is common for both the mobile platforms, Intune will smartly apply the policy to an appropriate Outlook version depending on the platform. From now on, the default signature in Outlook for Android and Outlook for iOS will be disabled on devices of users from selected Entra ID group(s).

See also:

• Learn how to disable native signatures for other platforms (Windows, macOS)