After a cutover migration to exchange online, Users only have 1 month of deleted items in their deleted items folder. some users are used to keeping deleted items forever so they are now missing crucial emails.
I have changed the rentention tag of deleted items to 'never'. So when I right click the deleted items folder and go to 'assign policy', it says Deleted Items(Never) for retention policy. Is there any way for me to recover the deleted items that are over a month old? Has changing the deleted items retention policy to 'never' made it so this doesn't happen again?