How to check if a users mailbox is converted from 8 to 12 ?

In GroupWise monitor all the GroupWise POA users are connected with GroupWise Client Release 3-26-2013.

But in console1 the information of a gw user is Client Version 8.0.2 and Client Type: Groupwise 8.0.x for Windows.

So what is the method to convert a user mailbox from 8 to verion 12 ?

With kind regards