I know it is just trading one mega-corp for another but the Outlook app doesn't use Google calendar. I don't think the Samsung calendar uses google either unless you hook it up to gmail, I had mine against an exchange server.
That explains it. My previous phone was a Samsung and it came with an app called "Calendar" that's not present on my current [non-Samsung] phone. Wonder if I could copy it over with ADB? Guessing it wouldn't work on a non-Samsung phone though.