Tuesday, November 17, 2009

MOSS 2007 403 forbidden error after .net framework updates fail to install

After unsuccessfully trying to install .NET framework 3.0 or 3.5 on your MOSS 2007 front end server, users cannot access any of the SharePoint sites including central or shared services administration sites. Error in IE is 403 forbidden. Using a NON-IE browser, the error is Directory Listing Denied.

Open IIS Manager and go to Sites, then Properties, then Home Directory Tab, then Configuration, then in the Wildcard Application Maps box, add the aspnet_isapi.dll located in C:\windows\microsoft.net\"framework" or "framework64"\v2.xxxxx

Ensure that the checkbox "Verify that the file exists" is UNchecked, otherwise error 404 page not found  ill be displayed. This is because the data is rendered from the SQL database and not from IIS locally, and SharePoint will process this on the run while the site is being accessed.

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