Unable to gather data for some mailboxes
Cause:
Insufficient permissions to access room mailbox calendar.
Resolution:
- Ensure that the user provided in Organization Settings page has Calendar access permission on required room mailboxes.
- If not, run the following commandlet in Exchange Management Shell:
Get-Mailbox -RecipientTypeDetails 'RoomMailbox' | Foreach-Object {Add-MailboxFolderPermission $_":\Calendar" -User <user n Org settings page> -AccessRights Reviewer}