Description of the Microsoft Office Existence Discovery Protocol

Microsoft Office 2007 applications can make an HTTP HEAD request to the URL location where a document is open from.  This request is new to Office 2007, and goes by the name “Microsoft Office Existence Discovery Protocol”.  The following posting describes this protocol and its intended use. To read the full posting for this issue,…

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Description of the Microsoft Office Existence Discovery Protocol

Summary When opening documents from a URL location in Microsoft Office 2007, the Office library can make an HTTP HEAD request to the web server for the opening URL.  This request is sent with a User-Agent set to”Microsoft Office Existence Discovery”.  This call is new to Office 2007. More Information The purpose of the HEAD request is…

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Excel 2007 Extension Warning On Opening Excel Workbook from a Web Site

Web sites that use an Excel 97-2003 MIME type to open conent streamed from the web server may find that users recieve the following alert message when the file attempts to open in Microsoft Excel 2007: “The file you are trying to open, ‘[filename]’, is in a different format than specified by the file extension….

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Excel 2007 Extension Warning On Opening Excel Workbook from a Web Site

Summary Web sites that use the “application/x-msexcel” or “application/vnd.ms-excel” MIME type to open web page content inside of Microsoft Excel may encounter the following warning prompt when the file attempts to open in Excel 2007: “The file you are trying to open, ‘[filename]’, is in a different format than specified by the file extension. Verify…

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