I found that editing contacts in vtiger never synced a change to
Google, although the "updated" count did reflect how many contacts had
been edited in vtiger, none of the edits were actually saved to Google.
Newly created Contacts are synced with all fields without an issue both ways.
I've tried different PHP Versions from 6.4 to 7.2, on a shared hosting plan and on my own server. result is always the same.
I need to get a sync for UPDATED Contacts from Vtiger to Google via Contacts API
4 freelancers are bidding on average €35 for this job
I have experience with api’s and php. Can help you with your contact sync. If you could provide any existing code and the servers you are working on. I can troubleshoot.