My client has an issue with opening FRx DrillDown reports (.frd) in SharePoint. Whenever they click on the document link, it downloads it as a zip file or cannot open it. If they select SendTo, Download a copy, then click open, it works fine. I have checked the file type association in windows explorer and the settings are correct. Does it have to do with the OpenControl in the DocIcon.xml?

I had to use application/???? as text/html did not open in drill down viewerDonny Kensmoe - Dynamics GP Consultant - Wipfli

I have added a MIME type in IIS as application/??? and also via a SharePoint powershell command. My web app browser settings are set as permissive. STILL all FRx files prompt to save rather than opening. Strangely I have one user who can open a single FRx file directly from SharePoint - all the others in the same library still prompt for save. What else can I try?