RICOH Spaces enables users to book Microsoft-integrated Meeting Rooms across different Microsoft tenants and from Google Workspace tenants.
To utilise cross-tenant booking capability, an M365 administrator must first complete specific setup requirements. This article outlines the necessary criteria in detail.
1. To make all Microsoft room resources bookable from Google Workspace or other Microsoft tenants.
Run the following commands in PowerShell as a Microsoft M365 admin.
$Members = Get-Mailbox -Filter {(RecipientTypeDetails -eq "RoomMailbox")}
foreach ($r in $Members) { $r | Set-CalendarProcessing -ProcessExternalMeetingMessages $true
-DeleteAttachments $false}
Note: Please ensure that the rooms you intend to make bookable can, in fact, be booked by the required user accounts via Outlook or Exchange Online, before proceeding with Step 2 and Step 3
2. Optional but recommended - Create a filter that allows booking requests only from your Google Workspace or other Microsoft tenant users.
To do this, set up a mail flow rule in Microsoft Exchange using the following parameters:
Apply this rule if the recipient is, then enter all the resources that allow booking requests from Calendar (for example, [email protected]).
Do the followingBlock the message, then select Delete the message without notifying anyone.
Except ifThe sender's domain is, then enter your Google Workspace domain.
3. Complete the steps for calendar integration for each Microsoft Tenant outlined in the article here