Microsoft may limit or block voice or SMS authentication attempts that are performed by the same user, phone number, or organization due to high number of failed voice or SMS authentication attempts. If you are experiencing this error, you can try another method, such as Authenticator App or verification code, or reach out to your admin for ...

Change or reset your Windows password. Accessing the account of someone who has died. Learn how to reset or change your Microsoft account password. Get help with a forgotten Microsoft account password.

Here's how to unblock your account. Note: If either your Outlook.com mailbox or your OneDrive storage is full, you cannot send or receive email. Check your Outbox or your mailbox storage to see what's taking up space. Learn more.

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

Learn how to start a one-to-one chat with SMS participants and send invites for others to join Microsoft Teams (free), so you can chat with them.

With Teams Premium and Virtual Appointments, you can send your customers confirmation and reminder SMS text messages to make sure they have their appointment information and have a simple way to join an appointment no matter where they are.

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.

If you want to stop a file or folder from syncing or backing up, you can pause the upload or download. See Stop syncing temporarily below for details. If uploads or downloads with the OneDrive website are taking too long, or you selected the wrong files, they can be cancelled.

If your system is asking you for your BitLocker recovery key, the following information may help you locate your recovery key and understand why you're being asked to provide it. Important: Microsoft support is unable to provide, or recreate, a lost BitLocker recovery key.

This service is free. Get help and support, whether you're shopping now or need help with a past purchase. Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.