How to Show Multiple Boardroom Bookings on One Calendar in Exchange
Question details
The user needs to combine multiple room resource calendars into a single, unified calendar view that displays all bookings and meeting organizers.
- Product
- Microsoft Exchange
- Device & OS
- not provided
- Scenario
- Managing multiple boardrooms and needing an overview of all meetings, schedules, and organizers in one centralized calendar.
- Observed behavior
- Exchange does not offer a native, direct setting to combine or merge several separate room resource calendars into a single unified view.
Ensure you have Exchange Administrator permissions, as you will need access to the Exchange Admin Center to create new resource mailboxes and configure mail flow rules.
Use a Master Resource Room and Mail Flow Rules
Since there is no direct merge setting, this workaround creates a central calendar that automatically receives copies of all room bookings via Exchange mail flow rules.
By creating a new 'master' resource room and setting up a mail flow rule, you can automatically Bcc this central room on any meeting invitations sent to your existing boardrooms. This forces the master calendar to accept and display all organizational bookings in one unified place.
Log into your Exchange Admin Center (EAC) and create a new room resource mailbox. Name it something recognizable, like 'All Boardrooms Calendar'.
Access the mailbox delegation and settings for the new master room. Ensure its calendar processing is set to automatically accept meeting requests.
In the Exchange Admin Center, go to the 'Mail flow' section and click on 'Rules'. Create a new rule.
Set the rule to apply when a message is sent to any of your existing boardroom resource mailboxes (add each boardroom to the condition).
Under 'Do the following', select the action to add recipients to the Bcc box, and select your newly created master resource room.
Save the mail flow rule. Send a test meeting invite to a standard boardroom and verify that the booking and organizer details automatically appear on the master resource calendar.
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Frequently Asked Questions
Can I combine Exchange calendars without creating a new room?
Natively, Exchange does not support merging multiple room calendars into a single view. The most reliable built-in method is using the Bcc mail flow workaround to consolidate bookings into a new master calendar.
Will the master calendar show the original meeting organizer?
Yes. Because the master calendar receives a direct copy of the meeting invitation via the Bcc rule, the organizer's details and the meeting information will be preserved and displayed.
Why aren't my test bookings showing up on the master calendar?
Ensure that the master resource room is set to auto-accept meeting requests. If it is set to tentative or requires manual delegate approval, the meetings will not display as confirmed until an administrator approves them.
Can I apply this mail flow rule to specific users only?
Yes. In the Exchange Admin Center, you can add specific conditions to your mail flow rule so that it only triggers for particular senders, groups, or specific boardroom recipients.
