Many excel files in our libraries are no longer able to be opened. They can be downloaded via the drop down menu, but will not open with a click as they should be. The pop-up message we get is;

"Unable to process the request. Wait a few minutes and try performing this operation again."

What is also weird is sometimes they are available for me and not for others and vice versa.

Any ideas?

1 Answer 1


You may have ASP.NET Impersonation Enabled, which shouldn't be used with SharePoint.

Disable the ASP.NET Impersonation at the Server level and "SharePoint Web Services" level.

Via: IIS > Authentication > ASP.NET Impersonation


  • Thank you Mike, but it is already disabled. Nov 25, 2014 at 16:04

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