I use Nine as my email client on the phone and Outlook 365 on my laptops.
I open Contacts on my phone, tons of duplicates – 2 or more of each.
If I open the Contacts app on my Windows 10 laptop, no duplicates.
I got a few warnings about duplicates and fixed them.
But there are dozens and dozens more duplicates, and the phone Contacts app can’t find them.
I can manually delete them, so they seem to exist.
Why is this so badly broken?