In our ISV solution for law firms we work a lot with Word documents. The documents are stored in SharePoint, but often accessed through Business Central (SaaS).

The Online version of Word still isn't a fully functional replacement for the desktop version, so we need to have a way to open Word documents in the desktop version. In previous versions of NAV - or in BC on Prem - we would just use .net Interop to do this, but this is naturally not possible in SaaS. Asking the users to click on "Open in Desktop Version" every time is very user un-friendly, and we have serious concers this might drive the customers towards our "non-bc-competitors".