One problem I see with this already from the group synchronization is each user still needs to validate their email address as I added an AD group and triggered an alert to the group and it only went to one user which had validated their email. So potentially new users would need to know to validate their email. I haven't looked at it much, but hopefully there is an obvious field (like validated) in the users list to see who hasn't validate and try to get AlertCentral to resend the validation email.
Agree. I think validation should be monitored by a process in AC. You tell AC how often to check for validation, and it nags the user for the update. I evaluated an alert system some time ago, and you could also set it to require periodic review and re-validation of all addresses. This made sure that ALL the addresses and user information were up-to-date. I think the default was quarterly.
The user screen needs to have a column showing Unverified, Partial, or Fully verified.