Is AD sync also fails when you select to use Registered LDAP server?
You can use this option (registered LDAP server) for AD sync.
Additionaly, What patch version of ePO 4.5 are you using. When you write the user name/password/domain details are you able to save the details under Group mapping or Save option is grayed out.
Please check if LDAP signing is enabled #: http://support.microsoft.com/kb/935834.
As i wrote above when we setup a LDAP test connection in "registred servers" the test goes thru´ fine. But the AD sync fails.
We are running patch 6.
And the LDAP require signing is enabled.
When trying to sync the AD, the log says:
EPOLDAP Bind failed, error = Invalid Credentials (49) user "domain\username", server "Servername", port 389.
Also fails on port 636 (SSL).
Do you use special characters in your password? I've had a problem in ePO with a password that contained the ampersand character ("&").
No speciel characters. I suspect this might be a security GPO setting that prevents this sync.