Lync Room System (LRS) Setup with Hybrid Exchange Online Deployment

I’ve found a number of articles that discuss setting up Lync Room System (LRS) with Exchange and Lync On-Premise and with Exchange Online but none that dealt with a Hybrid Exchange deployment.  Below are the steps I used to get LRS configured with Skype for Business Online and Exchange Online with a Hybrid deployment.  For more information on Lync Room System, check on the following link…

Create Room Mailbox in Office 365

  1. Connect to Exchange Online via PowerShell
  2. To create the Room Mailbox, run “New-Mailbox -room -name “Skype Room Test” -RoomMailboxPassword (ConvertTo-SecureString ‘Password’ -AsPlainText -Force) -EnableRoomMailboxAccount $true”
  3. To configure the required calendar processing, run “Set-CalendarProcessing “Skype Room Test”  -AutomateProcessing AutoAccept -AddOrganizerToSubject $false -DeleteSubject $false”
  4. Log into the Office 365 Portal.  Click on Active Users and find the Skype Room Test.
  5. Change the accounts Email Address / UPN to be “” (where is your primary UPN suffix).
  6. Assign both a license for Both Exchange and Skype for Business to the account

Create Remote Mailbox On-Premise

  1. Log into the Exchange Admin Center on-premise
  2. Click on Recipients –> Mailboxes
  3. Click on the drop down next to the + sign and select “Office 365 mailbox”
  4. Enter the appropriate account information
  5. Open the new account in AD Users and Computers and verify that the UPN and the primary Mail value match what you set in Office 365
  6. Force or wait for a directory synchronization to run
  7. Verify that the account in the Office 365 Portal shows as “Synced” versus “Cloud”

Enable Lync Room Account

  1. Connect to Skype for Business via PowerShell
  2. Determine an existing accounts Registrar Pool by running “Get-CSOnlineUser | FL Name,RegistrarPool”
  3. To enable LRS, run “Enable-CsMeetingRoom –Identity -SipAddressType EmailAddress –RegistrarPool” where “” is the RegistrarPool value determined in Step 2

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