Global Address book -> LDAP access

Hello all,

We are using Office 365 Business Premium.

We would like to use the Exchange Global Address List (GAL) as a phone directory for our Cisco SPA phones, To achieve this, we need to access the GAL using LDAP, is this possible? If it is; hurray! But how do i achieve this?

If not, can i create a LDAP address book in any other way? Preferably using Sharepoint?

thanks in advance!

Bernard.