Google sync issue

Hi,

We have a hybrid environment and we need help getting these environments to exchange information. O365 is on a separate domain and we struggle with that environment accessing google applications on another domain. Google calendar (it’s on its own domain but it has the same name as the office domain) migrating data to the team’s calendar using the standard google sync tool does not work). We have a lot of custom-scripted APIs to allow these environments to talk to each other. However, we have to make the standard APIs and we need help.