Change Retention Category on already archived items

Hello All

This is continuation post for below forum/post I started back in past:

https://www-secure.symantec.com/connect/forums/retention-category-not-updated

For quick background

Problem Statement: If we change retention category on particular folder in user mailbox (suppose inbox), the new retention is only applied on newly archived items. To stamp existing items with new retention category we've to either:

1. Change existing retention category itself, but we cannot do that because we want other folders to follow same old retention category.
2. Export and re-import items into user mailbox with option "remote items from archive" but it'll be lot of work considering there are thousands of users approximately.
3. Run complex SQL querues to change retention category ID in dbo.Saveset/Archive table for each user on per folder basis which is again too complicated and lengthy process.

So my question being, from version 9.0.4 to version 11 - if the feature is changed where if we change retention category for particular folder in user archive, existing items inherit new category as well?

Thank You in Advance !