Is there a way to turn off all email/SMS notifications, except for award achievements?

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We do not want learners to be overloaded with email notifications, especially from Announcements, however, we do not want to lose the ability to alert them of an award achievement.

 

We want them to be able to see Announcements while in the learning environment, but not be emailed every time a new announcement is added to multiple courses.

 

Thanks for any help that can be provided.