EBS to OID bidirectional integration

I had a query from an internal team , they had setup EBS 12.2 to oid 11g integration.A user created in EBS was populating to oid ,but user created in oid was not syncing up in EBS.

So, the above problem statement makes veteran Fusion experts know where to look, let me crack a simple to do list for dummies.

Came across a superb blog ,
https://blogs.oracle.com/stevenChan/entry/password_management_with_oracl


1)Issue in EBS to OID sync, Look in the EBS profile options.

Applications SSO Enable OID Identity Add Event

• When profile 'Applications SSO Enable OID Identity Add Event' value is 'Enabled', users created in OID are automatically created in E-Business and subscribed to the E-Business instance.
• When profile 'Applications SSO Enable OID Identity Add Event' value is 'Disabled', users created in OID will not be automatically created in E-Business. They can be created in E-Business (and subscribed to it) only after provsubtool or OIDDAS Edit Service Recipient page is used to subscribe existing users to the particular E-Business instance. 
• Application SSO LDAP Synchronization must be ENABLED regardless of provisioning type

2)Issue with oid user to sync with EBS , there are dip profiles which are created by default and are bidirectional by default.

• Log in to Oracle Enterprise Manager Fusion Middleware Control.
• In the navigation panel on the left, click or expand the Identity and Access entry and then select the DIP component that contains the profile you want to edit.
• Click the DIP Server menu, point to Administration, and then click Synchronization Profiles. The Manage Synchronization Profiles appears displaying a list of the existing profiles.
• Here it turned to be simple case of misconfiguration of OID details on em, i.e worng port on server properties of DIP application.This can be changed via command line or in the em console.

This is very very basic way to troubleshoot, there can be lot many things wrong.