Given the below scenario; I'm the IT Adminstrator who work in a Corporate company,Ther are 8 sister comany specilized in producing different goods .Their head quarter is in one location.In one company assume we have a new employer. The adminstrator wants to create new email address for an employee.After successfully created his/her email address-she is now able to communicate internally but she could not being able to communictae externally to the corportae headquarter. The company use email excahnge server 2008 and the Officeout look 2010. What is the main problem behind causing not to communicate externally. Please share your expericne. Thank you