How to delete shortcuts without deleting archived items

We are using EV 11. We are trying to the delete all the shortcuts in mailboxes without deleting the archived items.  All the archived items are at least 7 years ago. The retention is 7 years.  When we decided not to delete archived items, we set Storage Expiry to Never.  We only want to delete shortcuts, so we set the Shortcut Deletion to 1 day in the Mailbox Policy.  It's been a few days and it doesn't seems to work.  I checked the report and it keeps saying Shortcuts deleted is zero.  I ran the archiving task on a specific mailbox with very old shortcuts, in report mode and shortcuts processing mode.  Both reported Shortcuts deleted is zero.  Any idea?