All of my outlook email "groups" have disappeared. My "contacts" are all still there, but the "groups" I created are missing.
I see a number of others are having similar issues but no one from outlook has provided an answer, they keep asking the same questions: 1. Tell us how you check your email, 2. Have you made in recent changes.
After the recipients respond, they never hear back from the moderators again.
I use my email "groups" nearly ever day. However, when I woke up this morning, I found all my "groups" had disappeared from my account.
I use Windows 8.1; I check mail thru outlook.com via Chrome. It is the same with Internet explorer. It is also the same using the outlook app on my Android tablet.