Determine Domain and username used to map a network drive
Solution 1:
WMI is your friend:
> wmic netuse where LocalName="Z:" get UserName /value
UserName=rd-pc2037\Administrator
Solution 2:
None of these answers help when using alternate credentials. They only show the current, local user. That doesn't help.
To view all stored credentials, use...
rundll32.exe keymgr.dll, KRShowKeyMgr