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Sign in to my Office 365 business account

sean 0 Reputation points
2026-04-07T20:44:55.0466667+00:00

Since updating my iPhone, I have been locked out of my Office 365 business account on all devices. When I am asked to authenticate, I am unable to do so. This is extremely frustrating and it is not the first time that I have been randomly locked out. It would be helpful if there was someone who could help solve this problem. Customer support is shocking.

If anyone can help, I would be most grateful.

Microsoft 365 and Office | Subscription, account, billing | For business | Other
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  1. Henry-N 11,820 Reputation points Microsoft External Staff Moderator
    2026-04-08T08:12:29.24+00:00

    Hi @sean,       

    Thank you for posting your question in the Microsoft Q&A forum.           

    Regarding that you can't log in to your account due to Microsoft Authenticator. I’d like to ask a quick questions to better understand your situation and assist you effectively:      

    Could you please clarify whether you are an end user or an admin?             

    If you are an end user I would recommend you contact your account's Admin to reset your MFA settings through the Microsoft Entra Admin Center. Ask your administrator to follow these steps:                 

    Revoke MFA sessions and require re-register in the Microsoft Entra admin center.                

    User's image

    You could provide your admin this article for a better view: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID |…              

    If you’re unsure who the Global Admin is within your organization, you can find guidance on locating them here: How do I find my Microsoft 365 admin? - Microsoft Support.                 

    Thank you again for your time and understanding. While my initial response may not resolve the issue immediately, I’d like to gather more details about your situation so I can assist you more effectively.              

    I really appreciate your patience, and I’m here to help. Looking forward to your response!.                     

    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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