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You could add the new room by using PowerShell commands over the ExchangeOnline Module in PowerShell (2.1) or use the graphical interface in the M365 Admin Center (2.2)

2.1 PowerShell

a. Install or start Exchange Online PowerShell Module. You can install the Module directly in the PowerShell on your Computer:

1. Update your PowerShell to the latest version by using the following commands:

   Code Block
   winget install --id Microsoft.Powershell --source winget

   Please note that if you had PowerShell V5 before the new PowerShell V7 will be a new app on your PC, we recommend to use the version 7.x.

2. Now you can install the Module by the following commands:

   Code Block
   Install-Module -Name ExchangeOnlineManagement

   If you get an error message like the following, you have to allow PowerShell to run scripts:

   

   Code Block
   Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope LocalMachine

   After the installation, we recommend to set the policy again to “restricted”:

   Code Block
   Set-ExecutionPolicy -ExecutionPolicy restricted -Scope LocalMachine

3. You need to import the module :

   Code Block
   Import-Module ExchangeOnlineManagement

b. Execute the following command and connect to your Microsoft365 using an admin account.

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1. Fill this group with all room mailboxes. Don't forget to change the name of RoomzResources should you have used another name:

   Code Block
   Get-Mailbox| where {$_.RecipientTypeDetails -eq "RoomMailbox"} | foreach {Add-DistributionGroupMember -Identity RoomzResources -Member $_.UserPrincipalName}

2. Or fill this group with a specific room mailbox. You have to execute the following command and replace myROOM with the E-Mail of your room. Don't forget to change the name of RoomzResources should you have used another name:

   Code Block
   Add-DistributionGroupMember -Identity "Building 32 Conference RoomsRoomzResources" -Member confroom3223@contoso.commyROOM

2.2 Graphical user interface

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