Outlook 365 connection UiPathEventObjectId in Get mail activity

HI Experts ,

we have 20 outlook 365 connections and their respective triggers in integration service.
we want to read the mailbox name in the studio workflow to which email has been received .

i know by passing uipatheventobjectId to get mail activity can be used as per the UiPath documentation , but it is not working for me .

In short , i want to know which outlook connection got triggered in integration service

we have azure app with application/delegated level permissions.

this is my test workflow.

any ideas