Keep copies of all sent and received mail
I would like there to be a central location where all mail ever sent or received by any user is kept. This would continue even if the original mailbox is deleted or a user deletes the email.
Litigation/in place hold achieves this until you delete the mailbox.
The workaround at the moment is to never delete a user even if they leave the company. We have a six year retention policy meaning we would be paying thousands in license fees for this.
I understand you can convert the mailbox to a shared mailbox which doesn't use a license, but this seems rather messy to me and it doesn't stop a user deleting an email permanently.
you can put the Mailbox on litigation hold and remove the license.