I have a Sharepoint 2010 Enterprise server. It used to work OK, but now when I try to Open a document in Excel 2010 from a document library ("Edit in Microsoft Excel"), I get an windows Security login prompt.
It does not accept password, and the document ends up blank.
I can read the document in the browser, but not in Excel/Word.
I believe the error apeared after I changed some Access URL mappings.
I have verified I.E. trusted sites, and the sharepoint site is added there.