Not Inherit Full Access permission to All Mailboxes in Exchange 2013 CU1.

 Hello,

   I have to give a Full Access Permission of domain administrator to All my mailboxes in Exchange 2013 CU1 so I Used the following cmdlet

 Get-MailboxDatabase | Add-ADPermission -user administrator@doamin.local -AccessRights GenericAll -ExtendedRights Receive-As, Send-As

then After

when I was trying to GetUserOofSettings using Exchange Web Service, I got the Error: Access is denied. Check credentials and try again.(I have Passed domain Administrator credentials). 

But Same code is successfully run on Exchange 2010 SP2.

Is any changed in Exchange 2013 related to inherit Mailbox database permission?