Hi @Sergio Londono ,
Thanks for posting in our Q&A forum.
By research, there are some alert policies that can notify admins and specific people when a user is restricted from sending email. However, I could not find any way to generate an alert for the user himself.
Reference:
The default alert policy named User restricted from sending email automatically notifies admins:
Alert policy settings:
https://learn.microsoft.com/en-us/purview/alert-policies?view=o365-worldwide
Hope the above can help!
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