Hey @girishkg , we just released version 2.5.0 of the LDAP plugin for SCM-Manager. We implemented a small cache, where credentials rejected by the LDAP server are held for 5 seconds, so that further requests to the LDAP server in this time will be prevented. Succesful authentications have been cached for a long time, already.
Can you check if this works for you? We did not change the inherent workflow in SCM-Manager, that each authentication is sent to all authentication providers.