This looks OK
Get-MailboxFolderPermission -identity user1
FolderName : Top of Information Store
User : Default
AccessRights : {None}
Identity : Default
IsValid : True
FolderName : Top of Information Store
User : Anonymous
AccessRights : {None}
Identity : Anonymous
IsValid : True
But this dosent work, kalender is correct I've got swedish locale. I have trouble with this on 2-3 users, on the rest of the users it works.
Get-MailboxFolderPermission -identity user:\kalender
Get-MailboxFolderPermission : The security principal specified is already on the permission set.
At line:1 char:28
+ Get-MailboxFolderPermission <<<< -identity user:\kalender
+ CategoryInfo : NotSpecified: (0:Int32) [Get-MailboxFolderPermission], CorruptDataException
+ FullyQualifiedErrorId : 9A1AAD7E,Microsoft.Exchange.Management.StoreTasks.GetMailboxFolderPermission