Hi ,
Based on your question what i understand is given below.
You would need to have the option "Apply these settings to all folders now" selected on all the outlook clients through anyone of the global method.
Step 1:
Download the outlook office templates(.ADM file) and import it on anyone of the group policy.
Step 2 :
Then do the change on the Same group policy where you have imported the templates.
Step3 :
Then apply that change to the user to whomever you would like to have.
As an additional info if you are looking for an archive feature and retention policies.You can make use of both the features in exchange rather depending upon on the outlook client end features.