Some Users Are Not Available to Add into Approval Group

Summary

Some Users Are Not Available to Add into Approval Group

Content

Hi Team - I am creating an Approval group for use in Requisition Approval. All the employees have already been loaded as a part of Employee conversion. Now when creating Approval Group, I am getting some users and some users are not available for adding but i can see in Person Management all the users. So is there any job we are supposed to run ? or what could be the issue?

 

Any hints would be appreciated.

 

Thanks
Deepak.