Booth problem depend on the same settings i think.
You login method is set with the command “omd config” and there inside the section “Web GUI”.
The options “MULTISITE_AUTHORISATION” and “MULTISITE_COOKIE_AUTH” are set to “on” in a fresh installed site.
If you have an old site updated it is possible that these options are not set.
Manual Modification of the local Apache configuration is only needed if you want to use a Kerberos SSO login method.
If you press the logout button and the authorization is set correctly, the system will only remove your cookie and you should get the login screen back.
If a Apache basic out popup appears something went wrong in your site.