I have an ubuntu server with Asterisk v13.6.0 & Freepbx 13 and also an openldap server. I want to authenticate users via LDAP. I have advanced a little. I have made some progress. I have made some modifications in the configuration files and I can show the users of ldap server in the asterisk cli, but I don't register users in softphone clients. I have to load ldifs to store the extensions and users data in de ldap database. I wanted to know if I could do this with freepbx... There are not documentation for this version. I will continue trying... Thanks you very much for the reports! 
servuspruebas1*CLI> sip show peer maria load
- Name : maria
Description :
Realtime peer: Yes, cached
Secret :
MD5Secret :
Remote Secret:
Context : default
Record On feature : automon
Record Off feature : automon
Subscr.Cont. :
Language :
Tonezone :
AMA flags : Unknown
Transfer mode: open
CallingPres : Presentation Allowed, Not Screened
Callgroup :
Pickupgroup :
Named Callgr :
Nam. Pickupgr:
MOH Suggest :
Mailbox :
VM Extension : *97
LastMsgsSent : 0/0
Call limit : 0
Max forwards : 0
Dynamic : Yes
Callerid : "" <2002>
MaxCallBR : 384 kbps
Expire : -1
Insecure : no
Force rport : Yes
Symmetric RTP: Yes
ACL : No
DirectMedACL : No
T.38 support : No
T.38 EC mode : Unknown
T.38 MaxDtgrm: 4294967295
DirectMedia : No
PromiscRedir : No
User=Phone : No
Video Support: No
Text Support : No
Ign SDP ver : No
Trust RPID : No
Send RPID : No
Path support : No
Path : N/A
TrustIDOutbnd: Legacy
Subscriptions: Yes
Overlap dial : Yes
DTMFmode : rfc2833
Timer T1 : 500
Timer B : 32000
ToHost :
Addr->IP : (null)
Defaddr->IP : (null)
Prim.Transp. : UDP
Allowed.Trsp : UDP
Def. Username:
SIP Options : (none)
Codecs : (ulaw|alaw|gsm|g726)
Auto-Framing : No
Status : Unmonitored
Useragent :
Reg. Contact :
Qualify Freq : 60000 ms
Keepalive : 0 ms
Sess-Timers : Accept
Sess-Refresh : uas
Sess-Expires : 1800 secs
Min-Sess : 90 secs
RTP Engine : asterisk
Parkinglot :
Use Reason : No
Encryption : No