If you need to determine the 'server name' and 'share name' of a drive letter that was mapped with the net use command, you can call drivemap <DriveLetter> in your batch file. Drivemap.bat returns the server component of the mapped drive in the server environment variable and returns the share name in the the share environment variable. If the drive is not mapped, or you do not provide a valid drive parameter, both environment variables are set to None. Drivemap.bat contains:

@echo off                              setlocal                              set server=None                              set share=None                              if \{%1\}

\{\} goto end REM Clean up drive letter parameter set dl=%1 set dl=%dl::=% set dl=%dl:"=% set dl=%dl:\=% set dl=%dl%: if not exist %dl%\*.* goto end for /f "Skip=1 Tokens=3* Delims=\ " %%i in ('net use %dl%^|findstr "Remote name"') do set server=%%i&set share=%%j :end endlocal&set server=%server%&set share=%share%

If your CMD parser is pipe ( | ) challenged, you can use the following script:
@echo off                              setlocal                              set server=None                              set share=None                              if \{%1\}\{\} goto fin                              REM Clean up drive letter parameter                              set dl=%1                              set dl=%dl::=%                              set dl=%dl:"=%                              set dl=%dl:\=%                              set dl=%dl%:                              if not exist %dl%\*.* goto fin                              for /f "Skip=1 Tokens=1-3* Delims=\ " %%i in ('net use %dl%') do call :parse %%i %%j %%k "%%l"                              :fin                              endlocal&set server=%server%&set share=%share%                              goto end                              :parse                              if not "%1"=="Remote" goto end                              set server=%3                              set share=%4                              set share=%share:"=%                              :end