on the active sync program you need to add server here the first thing you will need to enter your e-mail address password and domain. After that is going to search automatically for configurations. Aferwards is going to ask you to enter the web address which will be depending on your company if it uses SSL then it will start with
https://mail.companyname.com and after that you will continue and it will give you the options to choose the items you would like to sync from your company. If this doesn't work then you will need to have the certificates from you IT department to sync with your phone and you will have to install those certificates on the device and go through the same steps again.