Search-MailBox and/or New-InboxRule error

Dear Experts,

  I've problems with creating maintenance jobs for Exchange 2013 CU5. I think is some permission problem, but I'm not sure and I don't know how to resolve.

  The Get-Mailbox command returns the list of mailboxes correctly, but If I want to run Search-Mailbox or New-InboxRule on any of the mailboxes except Administrator, both command fails. The error is the same:

"[PS] C:\Windows\system32>New-MailboxFolder -Parent Test.User -Name Test

The target mailbox or .pst file path is required.
    + CategoryInfo          : InvalidArgument: (:) [], ArgumentException
    + FullyQualifiedErrorId : [Server=EXCHANGE01,RequestId=4e4fee8e-1a79-43b6-add3-684bbebae44f,TimeStamp=2014.06.23.
   13:11:56] [FailureCategory=Cmdlet-ArgumentException] 8C1C28D3"

  But with Adminsitrator mailbox the same command works well:

"[PS] C:\Windows\system32>New-MailboxFolder -Parent Administrator -Name Test

Name                                    FolderPath                              HasSubfolders
----                                    ----------                              -------------
Test                                    {Test}                                  False"

  Best Regards,

Zoltan