Good news: The folks over at UP Information Technology Development Center - UP ITDC just announced that UP has now an institutional account with Zoom - all that is needed to do is choose the "Sign-in with Google" button and use your UP Mail to sign up.
For Mobile (Android/iOS) users, download the Zoom App and click "SIGN IN WITH SSO", enter "up-edu" as your company domain and use your UP Mail e-mail address as the username.
For more details and support kindly contact the ITDC helpdesk at helpdesk@up.edu.ph