After successfully promoting an IPA server to a replica, ipa-ca-install fails with "Directory Manager password is invalid"

This noob would appreciate a command and example to verify I have the correct directory manager password. I've looked through this page: https://directory.fedoraproject.org/docs/389ds/howto/howto-resetdirmgrpassword.html 

but haven't been successful in getting dsconf or ldapmodify to work.

server: ipa1.identity.demarcohome.com.
instance: slapd-IDENTITY-DEMARCOHOME-COM

# dsconf -D "cn=Directory Manager" slapd-IDENTITY-DEMARCOHOME-COM directory_manager password_change

Error: Could not find configuration for instance: slapd-IDENTITY-DEMARCOHOME-COM