Booking delegates not receiving meeting approvals

Question

Hello,

I have Exchange 2016 Hybrid environment.

There is an on-prem room mailbox called "1stFloorRoomA" and booking delegates who can accept or decline booking requests is on-prem user "UserA".

When another on-prem user for example "UserB" books "1stFloorRoomA", booking delegate "UserA" receives an approval email. But when Office 365 migrated user "UserC" books "1stFloorRoomA" booking delegate "UserA" do not receive an approval email.

What could be the reason?

sincerely,

Davit Ubilava

Answer 1

Hi @Davit Ubilava ,

I agree with the suggestions above, the cross-premises users may be judged as external which leads to this issue. You could firstly check if ProcessExternalMeetingMessages is enabled for this room mailbox

Get-Mailbox "Room" | Get-CalendarProcessing | Select *external*  

If the result returns ProcessExternalMeetingMessages : False, use the command below to configure the room mailbox process external meeting requests:

Get-Mailbox "Room" | Set-CalendarProcessing -ProcessExternalMeetingMessages $true  

Please note that this change will also only take effect for new meeting requests. Any meeting requests from external senders that were received before the setting was enabled will not be processed.

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Answer 2

Have you traced the request, does it actually land in the mailbox in the first place? Is the mailbox configured to process meetings from external senders, as misconfiguration can prevent it from seeing UserC as "internal".

Answer 3

Hello joyceshen,

Thank you for your solution, it worked