Generally speaking, we have plans in 2019 to work on multiple integrations, including taking a look at our overall integration strategy with Microsoft. I don't have any definitive timeframe at this point, but Microsoft is at the top of the list.
In the meantime, one thing to consider is that Jive's Collaboration Solution (which covers use cases for multichannel communication) is available for free through the Aurea Software Library. Someone from the Jive team could provide an overview, a demonstration, and dive into how we can help you further!
In addition, I'm currently working on improving the ACRM & Jive integration for 2019. So, I would be interested in joining a Jive discussion to see how I might shape some of our upcoming ACRM features to solve your problems better! Send me a private message and I will facilitate a meeting with the Jive team and myself to talk more!