Dynamics classic or legacy interface is deprecated and UCI is the replacement. The framework is only supported in UCI.
You can see more details on deprecation here - https://docs.microsoft.com/en-us/power-platform/admin/about-unified-interface
As of September 2019, the legacy web client is deprecated. Customers must transition to Unified Interface before October 1, 2020.
hemant
The PCF components are supposed to work only in UCI. At least that's what I understand from the sdk: https://docs.microsoft.com/en-us/powerapps/developer/component-framework/overview
The legacy "RefreshedUI" won't show the PCF components and it's already deprecated (will be discontinued on october 2020): https://docs.microsoft.com/en-us/power-platform/important-changes-coming#legacy-web-client-is-deprecated
You can find here how to activate UCI: https://docs.microsoft.com/en-us/powerapps/maker/model-driven-apps/transition-web-app
Best regards,
Diana
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