Automatically Login in external service when vieweing webmap

[RaghavGupta]

I want to use some external ESRI service which has credentials enabled in it, Though, I have credentials enabled to access it, but I want that service to be available to all my organization members as a layer in Webmap, and they should be able to view this service without logging in to that service. 

Please guide me how to implement such behaviour.

Thanks

[Todd_Metzler]

Is the "ESRI" service in the Living Atlas or other?  Have you an ArcGIS On Line Organization or only Enterprise?  If yes to having AGOL Org, have you enabled consumption of Esri content authenticated with an AGOL account in your Enterprise Portal Settings?

[RaghavGupta]

Nope the service comes from third party.

[Todd_Metzler]

Then, with the credential the third party service owner has provided you with, use a portal authenticated account to consume the service and, from this account share to organization.  Please note that this method may not persist as the third party token and/or method of authentication may not allow or the token lifespace may time out.  It's really controlled by the third party what can and cannot be done based upon your brief description.