Your message couldn't be delivered to the recipient because you don't have permission to send to it

Roger Roger 5,046 Reputation points
2022-04-15T09:33:28.157+00:00

Hi All

i am using exchange 2016 hybrid environment. we create room mailboxes using New-RemoteMailbox syntax from onprem.

When i am trying to schedule a meeting invite i am getting below NDR. i have checked Message Delivery Restrictions in both onprem and online, i dont see any restrictions imposed on this room mailbox. experts guide me.

Delivery has failed to these recipients or groups:
room1@Company portal .com
Your message couldn't be delivered to the recipient because you don't have permission to send to it.
Ask the recipient's email admin to add you to the accept list for the recipient.
For more information, see DSN 5.7.129 Errors in Exchange Online and Office 365.

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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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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Accepted answer
  1. KyleXu-MSFT 26,226 Reputation points
    2022-04-18T02:19:25.01+00:00

    @Roger Roger

    You could have a look about this article: Hybrid configuration issues
    193752-qa-kyle-10-15-34.png

    It is an expected behavior because room mailbox AD account is disabled on local AD.


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