Needing Different Age Based Policy for Calendar Items

Hi all,

If i could get some advice before i jump in and do this wrong.

We have a Default Mailbox Policy thats Archviving Items once they get to 6 months old, including IPM.appointment (calendar items)

The busines now wants to leave all calendar items until they are 2 years old before they are touched by EV.

I was going to create a new policy to only archive IPM.appointments, set it to 2 years. Remove that message class from the main default policy.

Then i wasnt sure, do i need to create a new provisioning group with the "Whole Exchange Org" as the tpye? Is it that simple, other than assigning that new Calendar policy to the new provisioning group....

Have i missed anything?

Thanks in advance.