So am trying to open work items in Excel on my machine (TFS 2010 and Excel 2007) and I received original error from Excel
TF80070: Team Foundation encountered an error while performing the operation.
I found instructions on how to turn on diagnostics to find the underlying cause which is the error in the title
TF249051: No URL can be found that corresponds to the following server name
I cannot find anywhere in Excel that I can tweak the settings. How can I resolve this issue?