Clarification in ESS User Licensing

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Dear All,

Greetings!

We are to implement ESS in a R3 4.7 Ext 1.10 system through ITS and SAP NW EP 6.0/SP21.

ESS Users will be using the portal system to verify their personal details and other functionalities. I have used SSO and User Mapping.

As per the settings the user created in the Portal System also needs to be created in the R3 system with the same user name as a dialog user. When I tried creating the user as a communication user I was not able to connect to my R3 backend system from portal using the defined communication user.

Is this because of some configuration problems in SSO and User Mapping or such a scenario is not

possible?

I have a series of questions,

1. If a user is created in R3 and Portal system only with ESS roles, should the user be allowed to login to the R3 system (or) the user logging-in to R3 system violates the ESS license?

2. If the ESS user ids are created in both the R3 and Portal systems, how will the license be calculated?

3. Is there a possibilty of maintaining the R3 ESS user id's as a communication user and not allowing them a login through SAP Logon GUI?

Kindly advice if I am wrong.

Expecting your replies at the earliest.

Thank you

Regards,

Vineeth