My work makes heavy use of shared files via email and Sharepoint. The
last Windows update IT rolled out broke all our links. Now, anytime
someone shares a file to you, you get a message from Outlook that the
link is unsafe and it refuses to open for you. Sharepoint is a Microsoft
product as is Outlook. You would have thought Microsoft would have made
sure its own products could talk to each other at a minimum, but
apparently that's not the case.
We have discovered a work-around, but it's a pain in the ass.