This morning Autodesk Desktop Application (AdA) worked and let me know that an update is available for Revit 2016, Update Release 5 … and in my case for R2.
AdA installed the update for me. I didn’t find any evidence of it on the public facing Autodesk pages but it was listed among the updates I could download from my account management panel at Autodesk, after signing in. Hopefully you’ll find AdA works for you too. If you’ve got to download it to deploy it for your firm then I’d visit the manage portal to download it there.