The new Service scheduling on Unified interface in built on top of Universal resource scheduling. If you are using legacy Service scheduling on web client and are planning your move to Unified interface, you need to plan your migration of data from legacy Service scheduling data to the new one.
Once you plan your migration, you can do the following.
* Manually configure records in the new experience. For more information, see Configure entity records in the new scheduling experience, or,
* Migrate using the migration solution.

