Hello @Veena Sagar ,
Thank you for posting here.
Based on my research, the event 4816 generates if RPC detected an integrity violation while decrypting an incoming message.
Activities that violate the integrity of the security subsystem include the following:
1-Audited events are lost due to a failure of the auditing system.
2-A process uses an invalid local procedure call (LPC) port in an attempt to impersonate a client, reply to a client address space, read to a client address space, or write from a client address space.
3-A remote procedure call (RPC) integrity violation is detected.
4-A code integrity violation with an invalid hash value of an executable file is detected.
5-Cryptographic tasks are performed.
Regarding of the purpose of the field "Peer", I am sorry I cannot find any information about it.
Also it seems it is difficult to reproduce the event 4816 in my lab.
However, would you please tell us what actual issue you encounterred now?
Should you have any question or concern, please feel free to let us know.
References
4816(S): RPC detected an integrity violation while decrypting an incoming message.
https://learn.microsoft.com/en-us/windows/security/threat-protection/auditing/event-4816
Audit System Integrity
https://learn.microsoft.com/en-us/windows/security/threat-protection/auditing/audit-system-integrity
Best Regards,
Daisy Zhou