Cannot add an additional mailbox to Outlook app

Tracy Garner 1 Reputation point
2023-01-06T15:36:10.97+00:00

We are migrating from Exchange on-prem to M365. We noticed yesterday that with Outlook mobile app (I am using Android version 42247812) when I try to Add Mail Account, the only option we have is to Add Shared Mailbox.
When I try to just type in my personal hotmail email address I get the message: Authentication failed. That didn't work. You may not have the right permissions to add this mailbox or this mailbox doesn't exist.
Has anyone else experienced this? What is the resolution?

Outlook
Outlook
A family of Microsoft email and calendar products.
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Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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  1. ChristyZhang-MSFT 22,071 Reputation points Microsoft Vendor
    2023-01-09T01:50:43.47+00:00

    Hi @Tracy Garner ,

    Glad to hear this issue has been resolved!
    Thanks for the sharing.

    However, due to a recent update in forum policy, the question author now is not able to accept their own answers.

    So I have written a brief summary of the solution this issue. Please feel free to accept it as the answer, which would benefit others who also has similar issues in forum.

    Issue:
    Cannot add an additional mailbox to Outlook app

    Solution:
    Using Outlook for iOS and Android in the Government Community Cloud in Exchange Online | Microsoft Learn

    https://video2.skills-academy.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-for-ios-and-android/outlook-for-ios-and-android-in-the-government-cloud

    1 person found this answer helpful.
  2. Nicolas Roche 411 Reputation points
    2023-01-06T17:09:23.37+00:00

    Hello,

    Did you use a professionnal smartphone or personnal ?
    If it's professionnal, maybe he have some block from MDM or Conditionnal Access

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  3. Tracy Garner 1 Reputation point
    2023-01-06T17:11:12.243+00:00

    It is my personal cell phone. We are not using a MDM nor have we applied any Conditional Access rules.

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  4. Tracy Garner 1 Reputation point
    2023-01-06T19:22:16.43+00:00

    Here's the solution:

    Using Outlook for iOS and Android in the Government Community Cloud in Exchange Online | Microsoft Learn

    https://video2.skills-academy.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-for-ios-and-android/outlook-for-ios-and-android-in-the-government-cloud

    0 comments