Setting LDAP authentication timeout

Does anyone know if you can set the timeout for LDAP authentication?

We have 2 LDAP servers and have set them both up in rhythmyx as separate security providers so when one fails it tries the other the only problem is it takes quite sometime for it to timeout and so when the first ldap server is unavailable logging in and workflowing takes a longtime.

I did find this

and it looks like you can set com.sun.jndi.ldap.connect.timeout but not sure if or where this can be set in rhythmyx

Any help appreciated