I created a Retention Policy and Retention Tags by following the steps in https://docs.microsoft.com/en-us/office365/securitycompliance/set-up-an-archive-and-deletion-policy-for-mailboxes
The policy deletes deleted items older than 3 weeks.
I manually applied (Optional) Step 5: Run the Managed Folder Assistant to the New Settings because "it can take up to 7 days in Exchange Online for the new retention settings to be applied to the mailboxes." However, I still see items older than 3 weeks in the mailbox.
Should the policy start removing deleted items older than 3 weeks immediately after manually running Managed Folder Assistant or will it take 3 weeks from the time I manually ran Managed Folder Assistant for items older than 3 weeks to disappear?