Hi Heather - While I'm researching O365 implementation with Jive, how it looks, how it works, I found this *awesome* demo video which shows how Jive for Office plugins for FAT client installs works seamlessly with live-collaboration features of O365.
Not shown in the video is what happens when an asynchronous version update published from a FAT client and the old plugin reaches an active session of O365.
If you are planning to implement Office 2016 as part of your Office 365 experience, then you should be aware that a new version of the Office and Outlook plugins was just released and will be required. Earlier version of Office and Outlook plugins do not always work properly with Office 2016.(Especially if you are running Office 32-bit on a 64-bit machine.) Here is where to get the latest versions that do work with Office 2016. https://community.jivesoftware.com/thread/301117
In our company, we are upgrading to these new versions of the plugins (3.50.15) as we have seen issues with older versions with our Office 2016 O365 users. Our testing shows these new versions work properly.
I should also note, that if a user is using the newer version of the plugin on Office 2013, then upgrades to Office 2016 via O365 click to run. It does appear to maintain the users plugin settings, and the plugins work automatically with the new Office.
The trick is to get the new plugins deployed first to all users, then upgrade to O365.
(If you are using Office 2013 with O365, then this won't be an issue.) But I think O365 defaults to 2016 now.