Are your notes suddenly disappearing in Office 365? That’s probably because you have enabled archiving in the Exchange Admin center with a retention policy set.
Don’t Archive Notes
The good news is there is an easy way to allow your users to mark the notes folder not to archive.
Step 1
In the Exchange Admin Center, browse to Compliance Management and then to Retention Tags.
Step 2
Add a retention tag of “Personal Never Move to Archive.”
Step 3
Now for the user, go to your Settings and into Options under OWA.
Step 4
You can then add the “Personal never move to archive” tag.
Step 5
Now back in your inbox, right click on the “Notes” folder and you can assign that new policy.
When you add a retention tag of “Personal Never Move to Archive” does it apply to all users so then you would have to set retention policies on every folder for every user?