This is meant for companies who have multiple instances/accounts with Justlogin and there are RO/AO who crossed approved leaves amongst these companies.
Note that the Approving History even for those in other companies will appear in the approving history in which the RO/AO logins at the moment of time.
To give a clearer picture, let me cite an example:
Let's assume John is an AO for company A and company B.
John's default login is in Company A.
A staff in company B sent in the leave request and John approve it via email.
The approving history will appear in the Approving History of company A and not company B.
So if John wants to see which leave he had approved, he has to login to company A and check it from there.