I want to add a Digital Twin block in my Logic App. To make this work I need to make a connection via Managed Identity. But there is no field to fill in the Host Name of the Digital Twin so the logic app does not no where to go to. I tried to add it in the API connections, but this is also not possible. And I tried to add it in the Logic App code view, but I didn't succeed.

Hello @Iris F, welcome to this moderated Azure community forum. This issue seems familiar with what I experienced two years ago an expected to be fixed already. Check out this blog post about Logic app integration with Digital twins. The same issue is described. You need to fix the connection by hand. Does this work for you? If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.

How to connect my Digital Twin to my Logic App (with managed identity)?

Accepted answer

Sander van de Velde | MVP 32,891 Reputation points MVP

2024-07-31T18:17:22.3066667+00:00

Hello @Iris F,

welcome to this moderated Azure community forum.

This issue seems familiar with what I experienced two years ago an expected to be fixed already.

Check out this blog post about Logic app integration with Digital twins.

The same issue is described. You need to fix the connection by hand.

Does this work for you?

If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.
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Iris F 25 Reputation points

2024-08-01T05:29:26.4533333+00:00

Thank you very much for the fast reply @Sander van de Velde | MVP !! I do have an additional question. Because with me the dialog venster for the ADT connector does not pop up. I tried varies things. Then I thought that it could work by adding 'alternativeParameterValues and parameterValueType', but I am not sure where to add those value. Because in API connections >JSON view I see the fields, but it is read-only. Could you give me an indication where or how to add those value?

Sander van de Velde | MVP 32,891 Reputation points MVP

2024-08-02T06:08:16.01+00:00

Let me check, this should have been fixed already so I did not write it down in such a detail at that time...

Sander van de Velde | MVP 32,891 Reputation points MVP

2024-08-04T18:52:01.7566667+00:00

Hello @Iris F,

I checked my (limited) notes and the solution is to create and deploy an updated ARM template so the ADT connection is created by hand:

This part was missing:

"alternativeParameterValues": {

"adtInstance": "XYZ.api.weu.digitaltwins.azure.net"

},

"parameterValueType": "Alternative",

We added the missing part to the ARM template of the API connection created redeployed it. Then, the API connection works.

It seems the Azure Digital Twins API connection functionality is broken so if you cannot fix this yourself, you can consider creating an Azure support ticket.

Iris F 25 Reputation points

2024-08-08T05:02:48.68+00:00

It worked. Thank you a lot!

Sander van de Velde | MVP 32,891 Reputation points MVP

2024-08-08T23:30:12.6833333+00:00

Great! Can you share the arm template / deployment script here to help others?
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How to connect my Digital Twin to my Logic App (with managed identity)?

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