The Domino HTTP Password Synchronizer is installed using the standard TDI installer wizard.
Read the section Configuration file options for available configuration properties. Configure both the plug-in and the Java Proxy.
Read the section Post install configuration for information about the required intermediate installation steps.
Read about the various password stores in this Guide (like the LDAP Password Store) and configure one.
Register the plug-in to the Domino Server as described in the section Deployment on Domino servers.