Version requirements for the Outlook mobile add-in - Signature 365

As of February 2024, Outlook Mobile now supports the Signature 365 add-in on both Android and iOS devices.

A number of pre-requisites apply to this being enabled and visible within Outlook Mobile, these are detailed below.

Note

Native mail clients such as Apple Mail or Gmail cannot support the Signature 365 add-in, you will need to user server-side injection for these clients

You will need to ensure that specific versions or later of Outlook Mobile and the Signature 365 add-in are in use to use this feature.

Outlook for iOS - v4.240.2.0

Outlook for Android - v4.2402

Signature 365 Add-in - v1.8

Updating the Signature 365 Outlook add-in

Manually update the Signature 365 Outlook add-in when a major release requires redeployment through Microsoft 365 or manifest-based installs.

Troubleshooting

Troubleshooting articles for Signature 365 client-side signatures, Outlook add-ins, mobile support, and common deployment issues.