Log In Issues Working Remotely

Hi, I now have to use two accounts for different employers - I'm a freelancer. 

I'm working remotely at present in a different country from where the email address of one of the employers is registered. 
It's an academic address. 
When I switched account and came back to that academic account on Zoom, Zoom detected an unusual login and sent a confirmation code to that email address. The only issue is, I can't access it from outside the country of origin due to my employer's outdated, clunky IT security. 

I don't want to add 2FA or use a VPN and do that every time I switch, which is several times a day. Not least because the VPN can affect connection speeds. 
Can someone suggest the best solution? 
Can I
1. Add a phone number to have the code sent there?
2. Change the email address to my gmail, without losing my licenced account privileges?
3. Something else?

Thanks for your help.