Hi Robert,
Yes, its possible to. We have SBC (Search Before Create) built within our Veeva CRM for users to tap into Reltio to look for HCPs/HCOs before they create new in Veeva CRM. It can be done via APIs using custom Visualforce page within Veeva CRM. We havent implemented DCR feature/workflows but I think its the same concept and supported. No need to use RIH (Reltio Integrations Hub) to achieve this in my opinion.
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Bhaskar Nunna
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