Name of a MailUniversalSecurityGroup is showing GUID or string in Exchange online. The MailUniversalSecurityGroup is synced from AD to O365

Ajaz Khan 266 Reputation points
2022-11-02T20:52:25.383+00:00

Hello there,
We have been observing that some of of the MailUniversalSecurityGroup's name is is showing as GUID or string in Exchange online when created in AD and synced to O365. The name attribute is correctly updated in AD on MailUniversalSecurityGroup .
The MailUniversalSecurityGroup is synced from AD to O365. When run Get-Recipient, the output is like
Name RecipientType
---- -------------
61fcb56f-61d3-420a-a7cf-ca378aedb9f4 MailUniversalSecurityGroup

This causes an issue when we add this group to give Send As access to the members on a shared mailbox.
Kindly share some thought on how to fix it.

Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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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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Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
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3 answers

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  1. Andy David - MVP 143.8K Reputation points MVP
    2022-11-02T21:03:06.317+00:00

  2. KyleXu-MSFT 26,226 Reputation points
    2022-11-03T06:35:23.863+00:00

    @Ajaz Khan

    Whether there exists hybrid for your organization?

    Send as permission is complex in hybrid: Mailbox permissions and capabilities NOT supported in hybrid environments

    You need to set permission from both Exchange on-premises and Exchange online.

    If there doesn't exist hybrid in your organization, could you tell us how you create this distribution group and which error when you set send as permission for shared mailbox?


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  3. Andy David - MVP 143.8K Reputation points MVP
    2022-11-03T19:08:43.213+00:00

    Is the shared mailbox hidden? It wont work if so.
    Does it work from OWA?

    What is the NDR if any when it fails?