Drag and drop Contacts from one group to another
You should be able to Drag and drop Contacts from one group to another and Alt/Option Drag and drop to copy a contact from one group to another.
This is a no-brainer. Just about everything these days provides drag-and-drop between common items, like Contact lists. MS Teams allows me to put Recent Chat contacts into the Favorites group from the '...' menu, but they can be put into no other Chat Contact groups. 'What??' I have a default 'Favorites' group FULL of contacts, and 11 EMPTY custom Contact groups that I cannot populate without manually entering each contact one-by-one, when they are right there in the same window next to each other. Please be more thorough with your design.
Skype for Business has this.
Nicolas Dumouchel commented
how in the world is that not something? you have to search the person, add it to the new group and then delete it from the old group, totally ridiculous experience.
Schwallo Schwallo commented
In Skype this was there, now they forgot to even implment the basics
I was amazed when I saw this wasn't supported