It sounds like your customer might be encountering a problem with their username or password. Here are some steps they can try to resolve this issue:
- Verify Credentials:
Double-check that they are entering the correct email address and password. Sometimes, a simple typo can cause the error.
- Reset Password:
- If they can't remember their password, they can reset it by following the "reset it now" link in the error message.
- They should follow the prompts to reset their password and then try logging in again with the new password.
- Check Account Status:
- Ensure that their account is active and not locked or disabled. This may require checking the status of the account in the Microsoft 365 admin center if they have access to it or contacting their IT admin for assistance.
- Clear Cache and Cookies:
- Sometimes, clearing the cache and cookies on the Mac Desktop can help resolve sign-in issues.
- Update Teams Client:
- Make sure that they are using the latest version of the Teams client. They can check for updates and install any available updates.
- Reinstall Teams:
- If the above steps do not work, they might try uninstalling and reinstalling the Teams application.
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