Can't sign in my office 365 account

Aung Thu 21 Reputation points

I can't sign in my office365 business account.
please check it. it display this message.


A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
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Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
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Accepted answer
  1. Xuyan Ding - MSFT 7,561 Reputation points

    Hi @Aung Thu ,

    1.If you simply failed to log in to the Microsoft 365 portal with your account, it is recommended that you try the account recovery option and try logging in InPrivate mode with a new browser. Or you could contact your administrator to confirm if there is an issue with the account license and if the account is still active and not expired.

    2.If you are invited to collaborate in a shared SharePoint folder as an external user, you need to verify that your account is added as a guest to Azure Active Directory in your organization's tenant.

    Microsoft 365 admin center > Azure Active Directory admin center > Users > All users

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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  1. T. Kujala 8,706 Reputation points

    Hi @Aung Thu ,

    Have you verified that your username is correct?

    Check also the following link.