What do I do if I get screen saying "Sharing Link Validation" when opening a file?

The first time you open a Read-only file using Keyavi's SharePoint-enhanced native file type support, you will see a screen asking you to validate the link. 

The screen will be Microsoft®-branded as the native file type support uses Files On-Demand. The message will request that you sign in to the specified account to get immediate access to the file. Simply click "Next" and sign in, as necessary. 

Note that this message and sign in request will only be presented the first time you open a Read-only file.