I've just find a solution. I don't know if this is the right one (official) but it worked for me.
The problem is that with ePO 4.5 patch 1 and later some thing changed, however the manual isn't updated yet. There are no more User Auto Creation, Windows Authentication and Windows Authorization settings in Menu -> Configuring -> Server Settings. Windows authorization and authentication are now part of Registering New Servers and User Auto Creation was changed to Active Directory User Login with only one option (true - for AD login with at least one permission set and false - no automatically login).
The missing thing was another user which had to be created for permission set (which was mapped to AD group) to login into ePO. With another word, i had to manually create new user with windows authentication and set permission (at the bottom) the newly created permission set for AD.
Hope this helps,
Is patch 3 avalaible for all? when the patch was released?
Patch 3 was posted for general download on 30th June.