Hi All, I just discovered something fascinating and am posting here in case this helps anyone else. It turns out that when I visited the OS X App Store and clicked the link to download and install Yosemite a few days after the general release, I assumed
I was getting Apple's public release, but it actually downloaded an early Beta version of Yosemite. Why it did this I have no idea. I only discovered this now because I kept checking the Update page on the App Store, and each time I was prompted to download
a newer Beta version. So I've now downloaded and installed Beta versions 1, 2, 3, 4, 5 and finally Beta 6. Google tells me that Beta 6 was the last Developer release prior to the final GM release. It's official version number was: OS X 10.10 (14A388b). Whereas
the final FINAL GM worldwide release is OS X 10.10 (14A389). The point being in my car that my issues with Outlook occurred when I was still running one of the earliest Beta version (1 or 2, not sure which). As this thread shows, others were having issues
with Outlook up thru version 3, and by version 4 issues seem to have abated almost entirely.
So - if you're experiencing issues, one thing to be sure to do before trying other workarounds is to use System Information to check your OS X version of Yosemite. If you, like me, somehow ended up with an early Beta installed on your system, it might explain
why you're having issues. And these issues might be resolved by upgrading to at least Beta 6, and even better, the final release - "14A389."
-Bruce