How to set OAB generation schedule to "Never" or "Always" in Exchange 2013

In exchange 2010, I can set OAB generation schedule to "Never" or "Always" with commands like this:

Set-OfflineAddressBook -Identity "\Default Offline Address Book" -Schedule never
Set-OfflineAddressBook -Identity "\Default Offline Address Book" -Schedule always
But in exchange 2013, it seems that these command don't work. And to set the OAB generation schedule, Exchange 2013 use command like this:
Set-MailboxServer -Identity MBXServer01 -OABGeneratorWorkCycle 01.00:00:00 -OABGeneratorWorkCycleCheckpoint 06:00:00 
How to set the generation schedule to "Never/Always"?