I think it would be helpful for group owners and managers to have a button they can click on to send an email to all members of a group.
- The button could be on the Members tab of the group.
- Clicking the button could prompt to select members to email or use the existing controls on the Members tab to select recipients.
- Confirming the selection then opens a blank email with the selected email addresses in the user's default email client.
If I have a group with 50+ users in it and I want to let them know about an upcoming change or new resources available to the group, it would be a lot easier to do that if I could somehow extract the emails of the group members through the ArcGIS for Portal UI.