When I've used another forwarding service in the past, things were weird with calendar and drive. I don't think drive is fixable but I'm curious if you have a working setup for calendar?

Hmm... My setup is that when I invite client for a call, I do this from my personal gmail and include business email as attendant (which goes through Gmailify). Now, when I get confirmation, I can confirm for both that they will attend, but I didn't try to see if I can open calendar with this other email. Based on this it sounds like it exists somewhere, but I really don't care as I have too many different things and all I want is to use my gmail accnt and look professional enough.

Hope this makes sense and sorry if it took longer to respond.