SAP PI 7.3 TO 7.4 upgrade Dualstack

Hello All,

I'm working on an upgrade project from PI 7.3 to 7.4 Dualstack. Mostly the interfaces are from FILE to SFTP with PGP used.

Can you guide me through the process what all changes needs to be done in ESR and ID. What challenges do we face in Upgrade Project.

Thanks & Regards

Shravan Kumar