Some assumptions to start
Easier to develop, can be answered from 2 perspective; technical and developer
Although I have limited experience; this is doable, Integrating with Microsoft is quite a generic statement, while it can be done in many ways;
Some can be covert out of the box using appstore modules, some might require own custom Java.
But in general integrating with Microsoft should be possible.
I think the biggest question to be answered is; is the developer willing to adopt a low-code platform in general.
Why would a developer switch from his beloved code/platform to Mendix?
Of course, asking this on a Mendix-forum, we will all cheer about Mendix, which is a great product. But if the company is Microsoft minded, they are likely to prefer .Net and PowerBI. That’s the first hurdle to overcome. And if they are in the process of choosing between Outsystems and Mendix: the first is a product built on .Net, the second is built on Java. So that would steer them towards OutSystems. To answer your question about “...integerate”, imho, Mendix has done a great job to facilitate creating and modifying interfaces and the DataHub is released, which adds lots of information and interfaces.
I believe it would be best if you contact Mendix sales in case of a question like this. https://www.mendix.com/contact-us/