Domino server mails not opening in the event of failover

Hi all,

We are using Domino server 9.0 and EV 10.0.4 mailbox and journal archiving

We have added one of our primary domino server in the EV target container and everything is working fine.

But whenever our domino server has failover to DR Domino servers users are not able to open their archived emails also journal archiving failed.

We have not added DR Domino mailbox servers in the EV target container yet. In order to open the emails from DR Domino server what should be the next action plan.

Do we need to add DR Domino servers in the EV target container and all prerequisites need to be follow? Please suggest.