Set-UMMailbox not listed in Exchange Powershell session? -

when creating new ps session our exchange 2010 server:

$session = new-pssession -configurationname microsoft.exchange -connectionuri http://exchange.domain.com/powershell -credential $cred 

and importing newly created session:

import-pssession $session 

this give me slew of exchange cmdlets can use locally within powershell session. unfortunately, seems missing few cmdlets need automate mailbox actions. -- set-ummailbox, allow me change operator's phone number on mailbox.

is bug particular configuration? or missing else?

if there way go doing this, i'm ears. thanks.

i found out issue here related permissions. service account using had majority of rights, not rights unified messaging. tested using domain admin account credentials (which won't using in script).