Using windows authentication with php?

Question

Scenario:

I have a area of a website that needs to be secure and accessible when offsite. I want the user to enter the username and password used to login at work i

Answer 1

You should be able to use LDAP, in your case it is most likely Windows Active Directory via IIS. There are php packages out there to interact with various types of LDAP implementations. Here is a link:
http://php.net/manual/en/book.ldap.php