Organizing and accessing contact information in Outlook.com
Your missing the point. I understand what a correct format is. The group list has worked before but now it doesn't. Nor does it help me see any way that I can find the emails that don't have the correct format and fix them other than going thru the entire list one by one and seeing if that's one of the broken addresses. And like several other changes to Outlook, there was no warning, no method to meet a new standard, and no help at fixing this after the change. I won't stay with Outlook if this can't be fixed.
Amen