You can write simple VBScript to query thru LDAP
Create a file with VBS extension
Put inside something like this
On Error Resume Next
Set objUser = GetObject _
("LDAP://CN=USER NAME,DC=DOMAIN_NAME,DC=com")
objUser.GetInfo
strMail = objUser.Get("mail")
WScript.echo "mail: " & strMail
Put correct USER NAME into LDAP query string, run VBS file and enjoy :)
If it is your first time you work with LDAP, it could be a little bit complicated to write LDAP query
In order to recognize the LDAP path to the user (i.e. what you need to put after LDAP://) you may download Active Directory Explorer from Microsoft
Run explorer, navigate to the user and see what it shows in the Path text box
In my case it was something like
CN=[user name],CN=Users,DC=[city_name],DC=[company_name],DC=com,