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Room Mailbox in Office 365 not Showing Details in Calendar

Last updated on Mar 28, 2017

By default the “Room” Mailbox in Office 365 only shows you the “Busy” Status.

A Client of mine has asked if there is a way to change this as the only view they have is the name of the “Organiser” so they want to view the “Subject” as well.

I will demonstrate below how to set the permissions in Office 365 .

First we need to connect create a Office 365 PsSession

We will start by Creating an PsSession to Office 365 and specify login details.

Next we will Specify the Link to Office 365 and Run the Command

$Session = New-PSSession -ConfigurationName Microsoft.Exchange-ConnectionUri -Credential $O365Cred -Authentication Basic -AllowRedirection


Next we will Import the newly created session 

(To Import the Session run: Import-PSSession $Session)

Next we will run the command to get all “Room” mailbox’s in the Tenant.

(To get a list of all “Room” Mailbox’s run:Get-MailBox | Where {$_.ResourceType -eq “Room”} )

Next we will Run a Command to show us the Current Settings for the “Room” mailbox “Training”

(To get the Properties of the “Room” mailbox run: Get-CalendarProcessing -Identity TrainingRoom | fl

After running the last command we can see the current settings for the “Room” mailbox and we can change what is needed. The three area we will change is :




We will then run the below command

Now We can run the follwoing command to make the changes :

Set-CalendarProcessing -Identity TrainingRoom -AddOrganizerToSubject $true -DeleteComments $false -DeleteSubject $false

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