Give Lobby access to a Microsoft 365 room calendar

Fix the most common Microsoft 365 sync problem by letting the connected account read the room's calendar.

1. 1

   Recognise the problem

   The calendar check says 'The address is right, Lobby just isn't allowed in', or the room shows a sync error saying Lobby can't read this room's calendar. The room mailbox exists, but the connected account isn't allowed to open its calendar.

   

2. 2

   Ask for Reviewer access

   Ask a Microsoft 365 admin to give the connected account Reviewer access (or delegate access) to the room's calendar.

3. 3

   Or run one line of Exchange PowerShell

   Your Microsoft 365 admin can run: Add-MailboxFolderPermission -Identity room@yourcompany.com:\Calendar -User connected-account@yourcompany.com -AccessRights Reviewer. Replace both addresses with your own.

4. 4

   Or use an account that already has access

   If another admin can already see the room, click Connect another account under Calendar accounts and sign in as them. Lobby tries each connected account for each room and keeps the one that works.

   

5. 5

   Check again

   If the check panel is still open, click Check again. Permission changes take effect straight away. Otherwise, wait for the next sync (within 5 minutes) or click Sync now on one of the room's screens, then look at the room's Overview tab.