We have activated SSO in Lansweeper, but we can still log in using also our regular login?
Verify that the "Enforce SSO" option is enabled in your settings. This is a crucial step that must be enabled for SSO to work properly.
Once you've set up your SSO connection new and existing Lansweeper Site users in your domain should be able to log in by selecting Log in with Single Sign-On. They will be asked for their email address prior to starting the SSO login process.