A digital signature is an electronic, encrypted, stamp of authentication on digital information such as email messages, macros, or electronic documents. A signature confirms that the information originated from the signer and has not been altered.

Follow the steps on this page to change the Microsoft account email address or phone number (also known as your account alias or username) that you use to sign in.

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

When connecting your devices wirelessly, use a 5 GHz network (you may see interference on a 2.4 GHz network). If you have a dual-band router, you may need to enable or separate the 5 GHz signal. If you are not sure how to do this, check your device manufacturer’s support site or contact your ISP.

If you see the error when trying to sign in with a Microsoft app, delete or uninstall the app. Then reinstall the latest version from Google Play, the Apple App Store, or the Microsoft Store for your PC.

This step will add the 2023 Secure Boot certificates to the UEFI “Secure Boot Signature Database” (DB) and Key Exchange Key variable. In addition, it will update the boot manager to the 2023 signed boot manager.

Restart your device in normal mode and try to sign in with your original profile. Note: After troubleshooting and resolving the issue, remember to set the Windows Defender services back to Automatic.

To fix this problem, you must install and run a supported browser, based on your operating system. If you're using Windows 10, the supported browsers include Microsoft Edge, Internet Explorer, and Google Chrome. If you're using a different operating system, you can check the complete list of supported browsers. Note.

You must create your security key and give it a unique PIN before you can sign in to your work or school account using the key. You may have up to 10 keys registered with your account.

Send digitally signed messages as clear text if you want to make sure that your digitally signed messages can be opened by all recipients, even if they do not have an S/MIME mail application and can't verify the certificate.