Re: How to check the user which posted the Idocs to ECC.

Hi Priyank,

In your receiver channel configuration, you would have configured RFC destination for sending the IDOC to ECC system. Go to T Code sm59, and check for this rfc destination. In the Logon & Security tab, you would see the user credentials being  maintained.

Using this user, the IDOC gets posted in SAP system.

Regards

Vishnu