Calendar invitations sent to my O365 email address go to Gmail instead

[Stuart Bruce]

When people send me calendar invites from Google Calendar they don't arrive in my Outlook O365 inbox, but instead go to my Gmail address and appear in my Google Calendar. I don't actually use either. This is despite the fact I have never given my Gmail address to the people sending the invitation. Has anyone else experienced this and how do I stop it?

[#2]

Hi @Stuart Bruce - did you previously have a custom domain set up with a Google business account that you have since switched to Office 365? We have a similar issue that I am trying to resolve.

[#3]

@Scott Fouts No I've never used a Google business account. When I search for help the only references I can find are from people in that scenario.

My 'workaround' is to set up a Gmail rule to forward emails from people I know use Google Calendar for invites. It's not perfect as you need to know you are meant to receive an invite. I've missed meetings because I've discussed tentative dates with someone then they've sent an invite I never see.