Hello I have same problem as you, then to solve it in Zentyal 4.2 you need to get the ADMIN USER AND PASSWORD;
1 - Go to your Zentyal-Console SSH, I use putty.
2 - Login with your user
3 - Type this command:
ps -ef | grep ldapThan you get like this:
proxy 12500 4099 0 08:01 ? 00:00:00 (basic_ldap_auth) -v3 -b DC=server,DC=com -f (&(samAccountName=%s)(objectclass=user)) -p 3268 -D CN=zentyal-squid-linux,CN=Users,DC=mercurio,DC=lan -w ujWt9tiP3s3SzXntW2EE -P
proxy 12501 4099 0 08:01 ? 00:00:00 (ext_ldap_group_acl) -v3 -b DC=server,DC=com -p 3268 -D CN=zentyal-squid-linux,CN=Users,DC=server,DC=com -w ujWt9tiP3s3SzXntW2EE -P -F (&(samAccountName=%s)(objectclass=user)) -f (&(samAccountName=%g)(objectclass=group)(member=%u))
root 14222 14209 0 10:53 pts/14 00:00:00 grep --color=auto ldap
Where: zentyal-squid-linux is the ADMIN USER and ujWt9tiP3s3SzXntW2EE is the PASSWORD.You configuration will be:
LDAP BASE SERVER: DC=mercurio,DC=lan
ADMIN: CN=zentyal-squid-linux,CN=Users,DC=server,DC=com
PASS: ujWt9tiP3s3SzXntW2EE
Tell me if solve your problem, thanks.
(Sorry my english)