When saving and editing office files in sharepoint behind the Unified Access Gateway. We are unable to save the document to the Document Library. We receive the message "the file is read only" pop-up message appears and are unable to save the document to the document library this is with all office files. Any suggestions on how to approach this issue?

Hi, Which port you are using to access SharePoint site on UAG ? What if you upload (from UAG) a new document and open it from UAG? same behavior ? Check this article - http://technet.microsoft.com/en-us/library/dd772157.aspx#BKMK_Publishing which says "When creating trunks and publishing applications, using non-standard ports is not supported; servers must listen on port 80 for HTTP, and port 443 for HTTPS" hope this helpsWarm Regards, Pratik Vyas | SharePoint Consultant | http://sharepointpratik.blogspot.com/ | Posting is provided "AS IS" with no warranties, and confers no rights