OUTLOOK

Error Information:

Resolved:

1. Check Meeting room permission.
   Get-MailboxFolderPermission MeetingRoom_1001:Calendar
   
2. Add user permission to this meeting room.
   Add-MailboxFolderPermission MeetingRoom_1001:Calendar -AccessRights Owner -User BearStudyHard@contoso.com
   
3. Check permission list of this meeting room again.
   

   Get-MailboxFolderPermission MeetingRoom_1001:Calendar
   

Reference:
Add-MailboxFolderPermission
Get-MailboxFolderPermission
Set-MailboxFolderPermission
Remove-MailboxFolderPermission