How to dis enroll Employees in Old Benefit plan ?

Summary

How to dis enroll Employees in Old Benefit plan ?

Content

Hello, I am trying to dis enroll Old medical plan for OE enrollment and it does'nt seems to be working for me .I followed as per Oracle document

1. Created eligibility profile and and used elgibility formula that sets Eligible -N and return eligible >Attached it to  Old Plan effective with effective date 01/01/2021. They asked to run the participation process ? What is this process that we we need to run to dis enroll ? - Did'nt dis enroll

2. I Under the benefit program i Updated the general tab  under old plan to "Current loose only  new nothing effective 01/01/2021 - Did'nt disenroll