Learn how to manage your Microsoft account security info and troubleshoot verification code issues.

There are a number of possible explanations for why verification codes don't always arrive. Read through the list of the most common causes, and see if any of them apply to you.

This article provides explanations for why verification codes from Microsoft don't always arrive. It includes a list of the most common causes, and solutions for each one.

If you're having trouble getting your verification code for your personal Microsoft account, see Troubleshooting verification code issues. If your question wasn't answered here, we want to hear …

After you've set this up the first time, you can return to the Security info page to add, update, or delete your security information. If what you're seeing on your screen doesn't match what's being covered in …

The following list outlines error codes and potential causes associated with Windows Update. Selectthe error code to view the detailed troubleshooting steps to resolve.

Excel provides special number formats for postal codes, Social Security numbers, and phone numbers. If these don't meet your needs, you can create and apply your own custom number format.

If you see any of these error codes, try the following steps first to fix the problem. If these steps don’t work, see Resolve Windows upgrade errors for more detailed technical info.

Notes: Microsoft Authenticator is not available for PC or Mac as authenticator apps are typically designed for smartphones for security reasons. Learn more. Microsoft no longer supports …

Sometimes when you run the Activation troubleshooter or try to activate, the error code and message will change. If the error code has changed, look up the new code below and follow the recommended …