Can anyone offer some advice as to how this challenge can be overcome??
Scenario
A Google account can have multiple email address associated with. e.g abc@yahoo.com can be an email address associated with a Google account, however if a user has Gmail setup, then the Gmail address becomes the primary email address associated with that account.
This is particularly relevant to Google Drive, ... where if a user abc@yahoo.com receives a Google Drive 'share' invitation (where the recipient is a non-gmail user) abc@yahoo.com will typically have to create a gmail identity.
Problem
Is there a way to check programatically via an API if abc@yahoo.com has a gmail account.
(I know its possible to type this manually into the Google Drive share screen), ..is there a programatic way of doing it?