Multi Table Lookup Field - Dynamics 365

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[In Next 7 minutes you will be able to create a multi table lookup field in D365.]

What is here in the video :
How we can create multi table lookup field using web api call. This will point now to 2 entities in a single lookup. Currently this is in preview mode. So I have tried creating it using the web api call.

Create Polymorphic lookup using XRM toolbox here:

For Code and Postman Setup:

Create Trial Instance with new UI Step by Step:

[pendekantisivasailaja]

How would you do achieve this in higher environments like test and prod?If we export and import the solution will it work?

[sumitarora]

Great Video.Can you convert existing lookup field to a Multi table lookup field?

[debopriyomukherjee]

It was a wonderful video. One Doubt, How you get the WEb API, which you are sending through Post Request? Please inform.