I see the new email capability in ArcGIS Enterprise 10.8.1 sends emails based on how soon licenses are expiring. I would like to expand that to create custom delivery schedules for emails designed by admins (separate Idea Add an HTML Email Builder for Emails sent from Portal ).
Have the ability to pick one or more dates and times an email should be sent out. This would be great for things like scheduled maintenance. There should also be a UI to see a queue of past and pending scheduled emails, and a way for admins to manage that queue.