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, or use our troubleshooter to help guide you.

Sign in to SharePoint. SharePoint is a browser-based app that you connect to through your web browser, like so: Go to office.com, and sign in to your work or school account. In the upper left corner of the window, select the app launcher > All apps > SharePoint. Tip: If you don't see the SharePoint app under All apps, use the Search box near ...

To unblock your account, you'll need to reset your password. Enter the email address of the blocked account, then enter the characters you see on your screen and select Next. Enter the code generated by your authenticator app or select Use a different verification option to get a text message.

Add, remove or update an email address or phone number. If you want to make changes to the email addresses or phone numbers associated with your Microsoft account, use our guided support tool below to help you update the right information in the right way.

You can resolve problems with Microsoft Authenticator by checking the tips in this article and reviewing some of the known errors. Tips: If you're using mobile data, try switching to Wi-Fi and vice-versa. Make sure Airplane mode is off.

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

To start a new conversation, select New message. Enter the name or phone number of a contact. Select the person you want to send a message to. A new message thread opens for you to begin with. If you encounter issues while using messages, our troubleshooting tips may help.

Follow the instructions. To give help if someone has requested it: Go to the search box and enter remote assistance, then select Invite someone to connect to your PC and help you, or offer to help someone else. Select Help someone who has invited you.

If you can't see the desktop and instead see a blue, black, or blank screen, see Troubleshoot blue screen errors or Troubleshoot black or blank screen errors. Check for Windows updates. Learn how to update drivers in Windows using Device Manager to update or reinstall a driver.

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