Hi @poonam_dogra ,
A few more checks you can then perform are:
-As you using User/Password to connect so check if "allowUserPassword" & "sessionTokenOnly" are set as true in the security zone tag (where your IP resides) in serverConf.xml file.
<securityZone allowDebug="true" allowEmptyPassword="true" allowHTTP="true"
allowUserPassword="false" label="Private Network (LAN)" name="lan"
sessionTokenOnly="true" showErrors="true">
-Check if the "mc" operator/(user that you using for connection) password in the RT instance is correct and the operator has the sufficed "Message center Execution" rights assigned to it.

Br,
Shubham
Hi @_shubham_goyal ,
Thank you so much for the valuable inputs and investing time on this. I have changed "allowUserPassword" to "true" but still no luck.
We are not using message center in our instance. The soap methods that I want to hit from soapUI, I have defined them in data schema to get the input from soap UI.
Is it something not possible if we do not have message center?
Thanks!