Can't Sign In

AJ James 21 Reputation points

Trying to sign into my client's account. Enter valid password then on to verification code sent to his phone. But that step fails every time. We need to be able to administer his Exchange Server. Any ideas?

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Dave Patrick 426.1K Reputation points MVP

    These are peer level support forums, there's really nothing we as users could do. It looks like you'll need to contact support.

    --please don't forget to Accept as answer if the reply is helpful--

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  1. udara peiris 671 Reputation points

    Check replication status if your customer is using more than one domain controller.

    Make sure to insert MFA code before exceeding the time.

  2. Joyce Shen - MSFT 16,631 Reputation points

    Hi @AJ James ,

    According to your information above, are you going to login your client's o365 admin portal or EAC?

    What error did you receive when you login failed entering the verification code?

    Here is the official document introduces about You can't sign in to Office 365, Azure, or Intune

    If an Answer is helpful, please click "Accept Answer" and upvote it.

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  3. Dave Patrick 426.1K Reputation points MVP

    Something here might help.

    --please don't forget to Accept as answer if the reply is helpful--

  4. AJ James 21 Reputation points

    Note that we've tried to enter different verification codes many times. No way I've entered them incorrectly every time, if at all. We've been very deliberate.

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