Answered
29 Aug 2018
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To achieve this, you would need to delete the user in Sitefinity and then create the Portal user through Dynamics CRM.
Refer to the following documentation on How to create Portal user in Dynamics CRM:
https://www.crmportalconnector.com/developer-network/documentation/how-tos/general-how-to/how-to-create-a-portal-user-from-crm
Thanks,