Adding Users and Agents

I've got my helpdesk up and running and I've imported a group of users from a test group I set up.  I'm wanting to use LDAP authentication which appears to be working fine.  What I'm having an issue with is registering the users I've imported.  I have to actually go into the user record and click the Register button to be able to select the default authentication method.  Is there a way to do this automatically or at least select all of the users from the directory and use the Register option in the drop-down menu?  Currently that just sets it to Locked(Pending Activation) and then the user has to go into the system and set a password.  Defeats the purpose of using LDAP in the first place.  I'm just wondering if I have something mis-configured or I'm just doing something wrong.

The second issue I have is adding an agent.  I want to add my AD account as one of the agents as I'd prefer to only use the admin account I created to manage the server/ticketing system rather than handling tickets.  I will also need to add other agents as I add new locations into the system.  I've tried adding my account into the Agent directory both with a user account registered in the system and no account.  I get an error saying "Correct the errors below." but there are no errors identified in the agent creation panel.  Any assistance you can provide would be appreciated.