SYMPTOM:
Exporting a report from Strategy Developer 9.4.1 and 10.x to Excel causes iasads.dll file to open directly within a separate Excel book. Note that this doesn’t affect the actual export from Strategy Developer.

CAUSE:
Iasads.dll is a Windows.dll file that relates to the “NPS Active Directory Data Store”. A related plug-in is available for Microsoft Excel may have issues loading with enabled, causing the related .dll file to be opened.
ACTION:
Disable the “NPS Active Directory Data Store” plug-in from Microsoft Excel.
KB426558