Notification before deletion and E5/F5 License

Hi @J-3804,

Welcome to post Q&A forum!

This feature is not enabled by default. To enable it, you need to create a retention policy that includes a notification action. This action sends an email to the user or a group of users before the retention period expires, notifying them that their content is about to be deleted.

Regarding your second question, you do not need to assign E5/F5 compliance and retention to every user. You can assign these licenses to only those users who need to receive notifications for review. For example, if you have a legal team that needs to review content before it is deleted, you can assign E5/F5 licenses to those users.

https://learn.microsoft.com/en-us/microsoftteams/retention-policies

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.