Invitations created in Microsoft Exchange and forwarded from Google to Outlook do not retain ownership-If you receive a meeting invitation in Outlook forwarded from a Google Calendar user, that was initially created in Exchange, you’ll receive the ICS file by email but the event is not added to your Outlook calendar.This happens if you turn on Notifications for your calendar in your Google Calendar settings. Requesting invitation responses-If you create a meeting in Outlook and choose not to receive responses from attendees (you don't select the Request Responses option), you might still receive responses.This happens if the meeting organizer created the meeting in Google Calendar and unchecked the "Guests can invite others" option. People can't always accept forwarded meeting invitations-If you forward a meeting invitation in Outlook to someone who accepts the invitation (by clicking Accept in your email), the event might not be added to the recipient's calendar.You will, however, have all attendees in your calendar.
Invitations from Google Calendar don't show all attendees-If you receive a meeting invitation in Outlook from a Google Calendar user, you won't view all attendees in the invitation email.When using Google Workspace Sync for Microsoft Outlook (GWSMO), here are some miscellaneous (and mostly minor) differences in Outlook Calendar, when sending invitations, determining ownership, updating events, working with recurring events, or changing time zones.