Applying Folder Retention Policies

I have gone ahead and created a RetentionPolicy to remove items older than 60 days from the DeleteItems folder. I have assigned the new Policy to a few users that were migrated from Exchange 2007 to Exchange 2013. When I use the get-mailbox command, I can see the new policy applied. However.... when I perform a get-RetentionPolicyTag -Mailbox "MovedMailbox" nothing returns. What am I missing here?

How can I confirm this policy is applying?

Thanks