Using eM Client desktop for Mac 9.2.2202, If I create a Google Calendar event and invite attendees, the attendees get the invites by email ok.
However when they accept the event invitation by email “using eM Client Android mobile app 9.3.6041”, I get an email saying they have accepted the event invitation, but my Google calendar still says “waiting for attendee” and never updates to say they have accepted no matter how long I wait.
However if the attendee accepts the Google calendar event invitation “using the Gmail mobile app”, not only do I get an email to say they have accepted the invitation, but my Google Calendar also updates that they have accepted with the usual event (green tick).
I also found this same issue with Android Spark mobile app when attendees are accepting Google calendar invites.I again get the email they have accepted the event invitation, but my Google calendar event never updates that they have accepted.
So seems to be something different that the Gmail mobile app does when the attendee accepts the invitation that it also updates the Google Calendar.