Room booking delegation acceptance not accepting

Question

Room booking delegation acceptance not accepting

Travis Fuller 0

Hey. I am tearing my hair out with Exchange online Resources. I have configured a booking delegation to a group, user, and shared mailbox and seem to have the same experience. A booking request is received; however, when the user clicks approve, the request disappears momentarily and then returns. The booking is never approved. This is the same for a declined request. I am using Exchange Online and have the following Calendar Processing options set:

AutomateProcessing : AutoAccept

AllowConflicts : False

AllowDistributionGroup : True

AllowMultipleResources : True

BookingType : Standard

BookingWindowInDays : 180

MaximumDurationInMinutes : 1440

MinimumDurationInMinutes : 0

AllowRecurringMeetings : True

EnforceAdjacencyAsOverlap : False

EnforceCapacity : False

EnforceSchedulingHorizon : True

ScheduleOnlyDuringWorkHours : False

ConflictPercentageAllowed : 0

MaximumConflictInstances : 0

ForwardRequestsToDelegates : True

DeleteAttachments : True

DeleteComments : False

RemovePrivateProperty : True

DeleteSubject : False

AddOrganizerToSubject : True

DeleteNonCalendarItems : True

TentativePendingApproval : True

EnableResponseDetails : True

OrganizerInfo : True

ResourceDelegates : {TESTING_BookingDelegation20241112083907}

RequestOutOfPolicy : {}

AllRequestOutOfPolicy : False

BookInPolicy : {}

AllBookInPolicy : False

RequestInPolicy : {}

AllRequestInPolicy : True

AddAdditionalResponse : False

AdditionalResponse :

RemoveOldMeetingMessages : True

AddNewRequestsTentatively : True

ProcessExternalMeetingMessages : False

RemoveForwardedMeetingNotifications : False

AutoRSVPConfiguration : Microsoft.Exchange.Data.Storage.AutoRSVPConfiguration

RemoveCanceledMeetings : False

EnableAutoRelease : False

PostReservationMaxClaimTimeInMinutes : 10

MailboxOwnerId : 016KD8 Subaru Crosstrek EV (White)

Identity : 016KD8 Subaru Crosstrek EV (White)

IsValid : True

ObjectState : Changed

Anonymous

2024-11-19T01:43:10.3166667+00:00

Hello, @Travis Fuller,

Is there any update on this thread? If the issue has been resolved, please mark the helpful replies as answers, this will make answer searching in the forum easier and be beneficial to other community members as well. Thanks for your understanding.

Best Wishes,

Alex Zhang
Anonymous

2024-11-21T07:03:36.5766667+00:00

Hello, @Travis Fuller,

Noted that you have not followed up on this case for a long time. Just circling back to check to see how things are going on with this thread. Should you need more help on this, you can feel free to post back.

If the answer is helpful please click on ACCEPT ANSWER as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions.

Best Wishes,

Alex Zhang
Anonymous

2024-11-26T01:51:45.2066667+00:00

Hello, @Travis Fuller,

Is there any update on this thread? If the issue has been resolved, please mark the helpful replies as answers, this will make answer searching in the forum easier and be beneficial to other community members as well. Thanks for your understanding.

Best Wishes,

Alex Zhang
Travis Fuller 0 Reputation points

2024-11-26T10:43:52.76+00:00

Hello @Anonymous , Apologies for the delay in my reply. I did everything you mentioned and I am still getting the problem. I traced the messages, and there are no issues with flow and no conflicts in the bookings. I have a case open with Unified support. I will post back an outcome.

Thanks,

Travis
Anonymous

2024-11-27T03:06:53.7166667+00:00

Hello, @Travis Fuller,

Thank you for your update and for taking the time to follow the steps I mentioned. I appreciate your efforts in tracing the messages and checking for any issues.

It's good to know that you have a case open with Unified support. Please keep me posted on their findings and any outcomes from their investigation.

In the meantime, if there's anything else I can assist you with, feel free to let me know.

Best Wishes,

Alex Zhang
Anonymous

2024-11-29T02:18:46.09+00:00

Hello, @Travis Fuller,

Any updates so far? If you have solved your problem, could you share with us? Maybe it will help more people with similar problems. Don't forget to mark it as answer, this will be easy for other community members to find the useful one.

Best Wishes,

Alex Zhang
Travis Fuller 0 Reputation points

2024-11-29T03:06:40.6166667+00:00

Nothing yet, unfortunately. Case is continuing to be escalated
Travis Fuller 0 Reputation points

2025-03-15T10:07:16.5533333+00:00

Update

I have just finished months of back and forth with Microsoft unified support and this is what we discovered.

Resource calendars that have been migration to Exchange online using the built-in Exchange migration tool, have extended flags set to read-only. This means that the delegation approval or reject workflow is not able to function properly. There is no way to fix this unfortunately, the only way is to re-build the calendars in Exchange Online.

The issues with the migration tool have been reported to the appropriate people within Microsoft. The migration was completed as per Microsoft documentation and steps were replicated with Unified support.

Long story short - do not migrate resource calendars with the built-in Exchange Migration tool.

1 answer

Your answer

Anonymous

2024-11-19T01:43:10.3166667+00:00

Hello, @Travis Fuller,

Is there any update on this thread? If the issue has been resolved, please mark the helpful replies as answers, this will make answer searching in the forum easier and be beneficial to other community members as well. Thanks for your understanding.

Best Wishes,

Alex Zhang
Anonymous

2024-11-21T07:03:36.5766667+00:00

Hello, @Travis Fuller,

Noted that you have not followed up on this case for a long time. Just circling back to check to see how things are going on with this thread. Should you need more help on this, you can feel free to post back.

If the answer is helpful please click on ACCEPT ANSWER as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions.

Best Wishes,

Alex Zhang
Anonymous

2024-11-26T01:51:45.2066667+00:00

Hello, @Travis Fuller,

Is there any update on this thread? If the issue has been resolved, please mark the helpful replies as answers, this will make answer searching in the forum easier and be beneficial to other community members as well. Thanks for your understanding.

Best Wishes,

Alex Zhang
Travis Fuller 0 Reputation points

2024-11-26T10:43:52.76+00:00

Hello @Anonymous , Apologies for the delay in my reply. I did everything you mentioned and I am still getting the problem. I traced the messages, and there are no issues with flow and no conflicts in the bookings. I have a case open with Unified support. I will post back an outcome.

Thanks,

Travis
Anonymous

2024-11-27T03:06:53.7166667+00:00

Hello, @Travis Fuller,

Thank you for your update and for taking the time to follow the steps I mentioned. I appreciate your efforts in tracing the messages and checking for any issues.

It's good to know that you have a case open with Unified support. Please keep me posted on their findings and any outcomes from their investigation.

In the meantime, if there's anything else I can assist you with, feel free to let me know.

Best Wishes,

Alex Zhang
Anonymous

2024-11-29T02:18:46.09+00:00

Hello, @Travis Fuller,

Any updates so far? If you have solved your problem, could you share with us? Maybe it will help more people with similar problems. Don't forget to mark it as answer, this will be easy for other community members to find the useful one.

Best Wishes,

Alex Zhang
Travis Fuller 0 Reputation points

2024-11-29T03:06:40.6166667+00:00

Nothing yet, unfortunately. Case is continuing to be escalated
Travis Fuller 0 Reputation points

2025-03-15T10:07:16.5533333+00:00

Update

I have just finished months of back and forth with Microsoft unified support and this is what we discovered.

Resource calendars that have been migration to Exchange online using the built-in Exchange migration tool, have extended flags set to read-only. This means that the delegation approval or reject workflow is not able to function properly. There is no way to fix this unfortunately, the only way is to re-build the calendars in Exchange Online.

The issues with the migration tool have been reported to the appropriate people within Microsoft. The migration was completed as per Microsoft documentation and steps were replicated with Unified support.

Long story short - do not migrate resource calendars with the built-in Exchange Migration tool.

Answer 1

Hello, @Travis Fuller,

Welcome to the Microsoft Q&A platform!

I can understand how this would bother you. I tested this and when I set the calendar processing options to match yours, I did not have the problem you mentioned. I recommend you take the following troubleshooting steps to help resolve the issue:

1.Message Trace: Run a message trace(https://learn.microsoft.com/en-us/Exchange/monitoring/trace-an-email-message/message-trace-modern-eac) to see if there are any issues with the delivery of the approval/decline messages. This can help identify if the messages are being delivered correctly or if they are getting stuck somewhere.

2.Check Delegate Permissions: Ensure that the delegates have the correct permissions to approve or decline booking requests. They should have “Full Access” and “Send As” or “Send on Behalf” permissions for the resource mailbox. Make sure the delegates are correctly listed and have the appropriate permissions.

3.Check for conflicts: Ensure that there are no conflicts with existing bookings, any conflicting requests will be automatically rejected.

4.Calendar Processing Settings: From your settings, it appears that "AutomateProcessin" is set to "AutoAccept". This setting should automatically accept or decline meeting requests based on the rules you've configured. However, if there's an issue with this processing, you might want to set it to "AutoUpdate" temporarily to see if that resolves the issue.

5.Check in Outlook and EAC: Respectively, see if you've set the option to automatically reject if certain requirements are met.

User's image

I hope the above methods will help you solve your problem. If not, we may need some additional information from you.

1.Are your sender, booking delegation and receiver in the same organization or are there some connections, and is the booking delegation a shared mailbox?

2.You mentioned “the request disappears instantly and then returns”, what do you mean by the request disappears and what interface is returned?

3.Does the same problem occur when trying to change the booking delegation?

If the answer is helpful please click on ACCEPT ANSWER as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions.

Thank you for your support and understanding.

Best Wishes,

Alex Zhang

Travis Fuller 0 Reputation points

2024-11-13T09:08:42.2233333+00:00

Hi Alex,

I tried the following and still having issues.

I added the users as Full delegates, Send as delegate and send on behalf delegates. This is on top of the booking delegate permission.

Checked for conflicts

Changed the processing setting to "Auto Accept"

Check the requirements

The users are in the same organisation as the resource, so I don't have to worry about external users. What I mean by the request disappearing is that the booking delegate receives an email to approve the booking, they approve the booking, the request disappears from their inbox and then within a few seconds, the request re-appears as if nothing happened. This is all within Outlook online.

I am having the same issue no matter who the booking delegate is.
Anonymous

2024-11-15T06:01:13.2966667+00:00

Hello, @Travis Fuller,

Thank you for your prompt reply.

Have you run Message Trace to capture the status of the message? If the above methods do not solve the problem, you may need to use some tools as well as consider other causes.

1.Check Booking Attendant Logs (Use Booking Attendant logs to investigate resource booking issues - Exchange | Microsoft Learn): Use the Exchange Admin Center (EAC) to collect and review the Booking Attendant logs. These logs can provide detailed information about what happens when a booking request is processed. You can find these logs under Troubleshoot > Collect Logs > Resource Booking.

2.View Resource Booking Policies: Ensure that the resource mailbox has the correct booking policy settings. You can do this through Exchange Online PowerShell.

Get-CalendarProcessing -Identity "ResourceMailbox"

3.Calendar Processing Settings: Double-check the calendar processing settings for the resource mailbox. Ensure that the settings are configured to allow delegates to accept or decline booking requests.

4.Check Delegation Settings: Verify that all delegation settings are correctly applied. Double-check that the specified delegates have the required permissions by using the following command.

Get-MailboxPermission -Identity "ResourceMailbox" Get-CalendarProcessing -Identity "ResourceMailbox" | fl ResourceDelegates

5.Update and Synchronize: Ensure that all client Outlook applications are fully updated to the latest version. Sometimes, synchronization issues can cause such anomalies. It might also help to clear cache and restart Outlook.

If the answer is helpful please click on ACCEPT ANSWER as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions.

Best Wishes,

Alex Zhang

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Room booking delegation acceptance not accepting

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