Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear SadıkEser,
Good day! Thank you for posting to Microsoft Community. We are happy to assist you.
Based on your description,you're having trouble with your account authentication. Seems you need assistance resetting the password for the admin account.
Please refer to the inofrmation below:
1.) If you are not the only afmin in your tenant, please contact another administrator to follow the steps in Reset passwords - Microsoft 365 admin | Microsoft Learn to reset your password. After reseting, you would be able to log in using the new password.
2.) If you're the only admin in your organization, since our forum is a public platform, we are not allowed or suitable to collect customers' account information. In this situation, please Find Microsoft 365 support phone numbers for business by country or region - Microsoft 365 admin | Microsoft Learn or Global Customer Service phone numbers - Microsoft Support to contact our support. Support will help reset password for you. They will keep your account safe and sucure.If there is any update or I misunderstand you, please feel free to let me know. I will continue to assist you. Your understanding and co-operation are highly appreciated.
Thanks for your precious time. Have a nice day!
Sincerely,
Sherry | Microsoft Community Moderator
Cannot login, Forgot PIN number