Our client has been using OOB alert functionality for a while in D365 FO. It doesn't work recently. I have verified creating the simplest alert in cust table for a record creation even that doesn't work.
Steps taken:
Created an alert from the base form(ListPage)
Run the change based alert batch job(It executed and ended successfully)
There are no emails received.
Can someone please show some light on what else would be missing and to be checked.