Common scenarios for unexpected credential prompting when opening Office documents from a web server

Symptom: Consider the following scenario…. A user browses to a WebDav or other website site, clicks into a document library and chooses to open (let's say) a Word document.  A challenge for credentials occurs.  Since the user was already prompted for credentials when browsing to the site, he/she was not expected to be prompted again…

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Prompted for Username and Password when Opening an Office file from a Web Server

ISSUE:   When opening Office files from a web server (i.e SharePoint), users are prompted for credentials, even if credentials have already been entered. CAUSE: The Office application is trying to access the document directly from the server which has to communicate with the server to determine what type of server that's accessing the file…

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