Load Remote Phone Book Error!

[cmcannon]

I think I have figured out what the problem is. I discovered this error in the syslog after trying to access the phonebook:

Aug 17 15:12:41 syslog: <6> |INFO| [http.c:3674] query header: GET /provisioning/0c7lb7j2kq/yealink_phonebook.xml HTTP/1.1^M Host: 10.10.128.222:5000^M User-Agent: Yealink SIP-T32G 32.70.0.221 00:15:65:6e:51:e3^M Accept: */*^M Connection: Keep-Alive^M ^M
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:3711] ***send data*** ......
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:3744] *****send data******* GET /provisioning/0c7lb7j2kq/yealink_phonebook.xml HTTP/1.1^M Host: 10.10.128.222:5000^M User-Agent: Yealink SIP-T32G 32.70.0.221 00:15:65:6e:51:e3^M Accept: */*^M Connection: Keep-
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:3816] *****recv header***** HTTP/1.1 200 OK
Aug 17 15:12:41 syslog: <6> |INFO| [http.c:3827] recv header: HTTP/1.1 200 OK
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:2373] Content-Type: text/xml
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:2373] Last-Modified: Mon, 17 Aug 2015 14:33:50 GMT
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:2373] Accept-Ranges: bytes
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:2373] ETag: "df31b9bbf9d8d01:0"
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:2373] Server: Microsoft-IIS/8.5
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:2373] X-Powered-By: ASP.NET
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:2373] Date: Mon, 17 Aug 2015 15:12:41 GMT
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:2373] Content-Length: 628901
Aug 17 15:12:41 syslog: <5> |NOTICE| [http.c:2373]
Aug 17 15:12:41 syslog: <3> |ERROR| [http.c:2456] remote file size:628901, max:512000
Aug 17 15:12:41 syslog: <3> |ERROR| [error.c:91] Errcode=0x01ff, desc:exceed max file size
Aug 17 15:12:41 syslog: <3> |ERROR| [error.c:91] Errcode=0x01ff, desc:error while querying http server, error code=200

It appears our phonebook is too big for the phone to load. Is there anything I can do to increase the size limit?