vTiger itself supports to authenticate with LDAP users in the core. However, the authLDAP module need to be added to get this works.
Please do following steps:
Download authLDAP at: http://forums.vtiger.com/download.php?id=278&sid=fc740e44553f4f8ba3aaf01a620019f0 Extract and copy the folder authLdap to modules/Users/ Enable LDAP authentication in config.inc.php by adding this code (below the DB settings):
//AUTHCFG $AUTHCFG['authType'] = . . . → Read More: Configure vTigerCRM to authenticate users using OpenLDAP (running inside Zimbra server)
