If you connect to your corporate Exchange server then you have full access to your Exchange Global Address List!
How do you access this? Very simply….
Do it in your E-Mail
Start creating your Exchange Mail
Select the +
Select the last option which will most likely be your e-mail address
Type the name in the Search Bar you want to find.
Select your Contacts
Select your e-mail address
Enter the name you wish to search for and press Search
The full details of the Exchange contact will be displayed and from here you can choose either to email or call.