I do not want user to create folder themselves in the root. However, I checked Default permission is "PublishingAuthor", that means all users are allowed to create folders in the root. How can I change that? I tried to run Remove-PublicFolderClientPermission -Identity "\" -AccessRights publishingAuthor -User Default But got below error: Remove-PublicFolderClientPermission : Failed to commit the change on object "\" because access is denied. At line:1 char:36 + Remove-PublicFolderClientPermission <<<< -Identity "\" -AccessRights publish ingAuthor -User Default + CategoryInfo : NotSpecified: (0:Int32) [Remove-PublicFolderClie ntPermission], MapiAccessDeniedException + FullyQualifiedErrorId : 65302671,Microsoft.Exchange.Management.MapiTasks .RemovePublicFolderClientPermission

You create a folder in the root and then assign the permissions on it . that will be the folder the user will be able to see . Not the root. For eg you create a folder Test.. and assign user the permissions to view , then only the root of the folder will be test . allow the user to create a folder beneath test. I hope , your question was understood by me.

I found my answer. Though reason is still unknown, I suspect it is EV changed my settings that allow everyone to create top folder in the public folder root. I corrected this by using ASDIEdit.