From version 1.3.x onwards the Polycom debut is unable to download and display the Pexip service phonebook for the organisation.
It has been seen that the LDAP connection on the Debut is reported to be active at boot-time, but later goes into a failed state.
No current workaround is known at this time. Call services will continue to work for the Polycom Debut.
This issue DOES NOT affect Polycom Group Series, HDX, and RealPresence Mobile/Desktop devices.