Room Mailbox free/busy not working with office 365 mailbox in Hybrid Environment. Although working fine with on-prem mailbox

Question

Room Mailbox free/busy not working with office 365 mailbox in Hybrid Environment. Although working fine with on-prem mailbox

Zohaib Yousuf 21

after troubleshooting, we observed that working fine with previous version but not working on below outlook version.
Microsoft® Outlook® for Microsoft 365 MSO (Version 2409 Build 16.0.18025.20030) 64-bit.

As per Microsoft support person. "we have almost 20+ tenants have been reported since yesterday. I will feedback this to our team."

2 answers

Your answer

Answer 1

Anonymous

Hello, @zohaib yousuf,

Welcome to the Microsoft Q&A platform!

Based on your description, I understand that your Room Mailbox free/busy do not work with office 365 mailbox in Hybrid Environment, while it works fine with on-prem mailbox.

What are your current default permissions settings for the “Calendar” folder? To find this, please follow the steps below.

Open and log in to OWA.
Right-click on the folder and select Sharing and Permissions.
In the dialog box that appears, you will see a "Permissions" tab where you can view and change the default permission settings.

According to the official Microsoft documentation, if the default permissions are set to None or Contributor, no free/busy information is displayed for remote users, and users cannot view the mailbox calendar. This is because neither kind of permission offers any level of free/busy visibility. User's image

If a remote user must be able to see free/busy information for the mailbox, the mailbox owner can work around this issue by changing the default permissions to Free/Busy time or Free/Busy time, subject, location. For specifics on how to accomplish this, you can click on Users can't see free/busy information after a mailbox is moved to Microsoft 365 - Exchange | Microsoft Learn for reference.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Thank you for your support and understanding.

Best Wishes,

Alex Zhang

Zohaib Yousuf 21 Reputation points

2024-10-15T11:24:49.61+00:00

we observed that working fine with previous version but not working on below outlook version. Microsoft® Outlook® for Microsoft 365 MSO (Version 2409 Build 16.0.18025.20030) 64-bit.

As per Microsoft support person. "we have almost 20+ tenants have been reported since yesterday."
Anonymous

2024-10-17T06:24:37.28+00:00

Hello, @zohaib yousuf,

Thank you for your prompt reply.Have you tried the options I suggested above? If the problem persists, here are some possible steps to help you with this.

1.Check Hybrid Configuration： Verify that the hybrid environment is configured correctly, especially the permission settings for mailboxes and calendars.

2.Logs and Diagnostics： Examining and collecting relevant log information may help you or the support team better understand the root cause of the issue.

3.Temporary solution： If this is a widespread issue, a temporary solution may be needed, if this is a widespread problem, a temporary solution may be required, such as using a previous version of Outlook or Outlook for the Web (OWA) to handle conference room bookings until the problem is resolved.

Moreover, you may find a solution to your current problem with the help of https://support.microsoft.com/en-us/topic/how-to-troubleshoot-free-busy-issues-in-a-hybrid-deployment-of-on-premises-exchange-server-and-exchange-online-in-office-365-ae03e199-b439-a84f-8db6-11bc0d7fbdf0.

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
Anonymous

2024-10-29T01:32:46.2166667+00:00

Hello, @zohaib yousuf,

If an answer has been helpful, please consider accepting the answer to help increase visibility of this question for other members of the Microsoft Q&A community. If not, please let us know what is still needed in the comments so the question can be answered. Thank you for helping to improve Microsoft Q&A!

Best Wishes,

Alex Zhang

Answer 2

Zohaib Yousuf 21

Summery:

We encountered an issue with the Room Mailbox free/busy status not displaying in the latest version of Outlook, although it was working fine in Outlook Web and previous versions of Office 365 Outlook. I reported the issue to Microsoft.

The Microsoft support team identified that other regions were experiencing the same issue and escalated it to the Microsoft Product Engineering Team.

Yesterday, the support team confirmed that the Product team resolved the issue from the backend, and improvements were seen in other regions as well. After checking, I can now confirm that the Room Mailbox free/busy status is displaying correctly in both the latest and previous versions of Outlook. Alhamdulillah, the issue has been resolved.

Anonymous

2024-10-21T01:15:29.1666667+00:00

Hello, @zohaib yousuf,

Great to know that the issue has already been resolved and thanks for sharing the solution so that others experiencing the same thing can easily reference this! Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others", I'll repost your solution in case you'd like to "Accept" the answer : )

--------------

Issue Symptom:

Room Mailbox free/busy do not work with office 365 mailbox in Hybrid Environment, while it works fine with on-prem mailbox.

Resolution:

The support team confirmed that the Product team resolved the issue from the backend, and improvements were seen in other regions as well.

Best Wishes,

Alex Zhang
Anonymous

2024-10-24T01:10:19.04+00:00

Hello, @zohaib yousuf,

If an answer has been helpful, please consider accepting the answer to help increase visibility of this question for other members of the Microsoft Q&A community. If not, please let us know what is still needed in the comments so the question can be answered. Thank you for helping to improve Microsoft Q&A!

Best Wishes,

Alex Zhang

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Room Mailbox free/busy not working with office 365 mailbox in Hybrid Environment. Although working fine with on-prem mailbox

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