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Exchange hybrid fail

Raymond Cheah 21 Reputation points
2022-06-07T02:23:13.853+00:00

Hi,

I need help on here. Getting error no shared domain names has been detected within the exchange online and on-premises organizations!
Added contoso.com into O365 domain and verified.

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Exchange Online
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
Exchange | Hybrid management
Exchange | Hybrid management
The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.
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  1. Aaron Xue-MSFT 2,601 Reputation points Moderator
    2022-06-08T06:55:03.557+00:00

    Hi @Raymond Cheah ,

    Have you tried below steps to solve the issue?

    1. From Active Directory, add contoso.onmicrosoft.com to the UPN suffix list.
    2. From the Exchange admin center in Exchange Online, modify the contoso.onmicrosoft.com accepted domain.
    3. From the Microsoft 365 admin center, add contoso.com as a domain.

    If you haven’t, please try it and check if the issue still persists.

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

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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  1. Philippe Levesque 5,841 Reputation points Volunteer Moderator
    2022-06-07T02:39:57.753+00:00

    Hi

    The error is because you need to add the domain name to the cloud, and on the on-prem.

    Did you had your domain name validated and included inside your cloud account for your tenant ?

    1 person found this answer helpful.
  2. Amit Singh 5,321 Reputation points
    2022-06-08T03:39:53.187+00:00
    1 person found this answer helpful.

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