Unwanted Contact Groups

I see a lot of "No Name" entries on my iOS 9.3.5 device as well. It's a known, long-standing problem, apparently. Multiple 'No Name' contacts showing up in Address Book. Note the year of this article is 2011. There are many recent articles about it as well, like iPhone users report mysterious 'no name' contacts glitch day before iPhone 7 launch.

That first link refers to MobileMe though. We're talking about Outlook. I only have the No Name contacts on my iPhone and no other device, not even on Outlook.com, and it's only in the Group called "PersonMetaData".

So it appears there are 2 separate issues here:

1. Outlook creates contact groups by itself which can't be removed (Skype, Facebook etc)
2. Outlook is creating 2 extra contact groups (MeContact, PersonMetaData) and filling up PersonMetaData with No Name contacts on iOS devices.

I see a lot of "No Name" entries on my iOS 9.3.5 device as well. It's a known, long-standing problem, apparently. Multiple 'No Name' contacts showing up in Address Book. Note the year of this article is 2011. There are many recent articles about it as well, like iPhone users report mysterious 'no name' contacts glitch day before iPhone 7 launch.

And also these extra groups like the person meta data

I have the exact same problem. I don't know if it was the iPhone update recently or what.

"MeContact" reminds me of the me.com service that preceded iCloud and I'm inclined to think it's something your phone is doing, particularly since that's where you see it.