[OmarIsmail]

Business service = you pay for it, either directly or as part of your G-Suite subscription. I don't believe you that they told you to move to Allo/Duo. Hangouts works, still works, and will continue to work for the near future. It has hundreds of millions of users.

[mirhagk]

Depends on your definition of works. Hangouts is the only piece of software that is less reliable than visual studio.