The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Before you can use Authenticator as a way to sign in, you need to download the app and have already added Authenticator to your accounts. Starting July 2025, the autofill feature in Authenticator will stop working, and from August 2025, passwords will no longer be accessible in Authenticator.

Learn how to add all your different accounts to the Microsoft Authenticator app.

If you encounter issues with Microsoft Authenticator, you can submit feedback from Link to Windows app by following these steps: For New users: Launch Link to Windows on your Android mobile device Click on Details. Navigate to the menu (…) in the upper right corner of the screen Select Give us feedback from the dropdown

An authenticator app like Microsoft Authenticator that can provide easier verification, and also allows you to sign in even if the verification device is offline.

You will see sign-in requests appear either on the lock screen or in the Outlook mobile app. You'll also be able to get one-time passcodes, which you can copy/paste into other sign-in screens.

Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

In the Microsoft 365 Copilot app you can upload or create files, ask questions, collaborate on AI-generated content, set up agents that help you be more productive, and add a wide array of custom agents and apps.

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.

Whether it’s a new job title (congratulations!) or a phone number change, make sure you keep your email message signature up-to-date. If you're using new Outlook, for more information about email signatures, or if you haven’t created one yet, see Add a signature to messages. Select File > Options > Mail > Signatures. Select the signature you want to edit, and then make your changes in the ...