Asterisk Phonebook

Im new to this IP Telephony and my new company uses elastix 2.4 and FreePBX and SIP devices are polycom. I got a list from my Admin for updating extensions and its display names which is very simple and i had done the same. But the thing is even after the update still if i dial the extension I’m getting the old names only. So could any one help out how to solve the issue.

Thanks in advance.

FreePBX support is provided at