In a meeting two teams, mine and another one, quite lightheartedly agreed to my proposal to use a common and very popular tool for a project. It is actually a market leading browser-based collaboration tool allowing integrated texting and graphing, which would be though new to them.
My team delivered initial documentation and shared access using the tool agreed upon.
After that, other team's contribution comes as an attachment per email in a proprietary format and a PDF export, where they needed to rework our initial input to get started, with a comment that the tool we had agreed upon was a "counter-intuitive to understand it in a couple of minutes".
How to react?
Both tools are recommended and available for use in the organization; my proposal suggested to use that one as it allows for faster collaboration and zero effort in sharing.