Setting the "size" column globally on GroupWise clients


I'm in the process of issuing out mailbox quotas (Trust me, it was long over due). I don't think you can but I figured I ask anyway for 2014 SP1. Can I set a custom column to show on everyone GroupWise client? I would like my GroupWise users to see the mail item size from their GroupWise view. I know that the user can view the mail size from the "Mailbox Storage Exceeded" when trying to reduce their mailbox size or set it in the "Mailbox > Properties > Display > More Display Settings >Edit Columns". I was hoping that there was a way to possible set this size column (or maybe other available columns) globally or on the post office level.