Logic app - Hybrid connection and Custom connector

Question

Logic app - Hybrid connection and Custom connector

Emil Blohmé 20

Hello! Is it possible to use Hybrid connection for logic apps together with a logic app custom connector? Or is it only the HTTP action which is supported with hybrid connection?

BR,

Emil

Loknathsatyasaivarma Mahali 2,740 Reputation points Microsoft External Staff Moderator

2025-03-24T18:12:06.2166667+00:00

Hello Emil Blohmé,

Yes, it is possible to use a Hybrid connection with Azure Logic Apps alongside a custom connector. The Hybrid connection allows you to securely connect to on-premises resources, and it can be used in conjunction with custom connectors you create for your Logic Apps. While the HTTP action is commonly associated with Hybrid connections, custom connectors can also leverage these connections to access on-premises resources.

Also refer to this document for better understanding.
Emil Blohmé 20 Reputation points

2025-03-25T07:37:57.7766667+00:00

Hello!
Thanks for a quick response. I tried creating a custom connector for one of our on-prem systems api. I have also added the hybrid connection to the hybrid connection manager. When running the api with a HTTP action in a logic app everything works fine but when I run my custom connector towards the same host I get the error message "The remote name could not be resolved". I read the document that you provided but can't find anything about hybrid connection in it. Do I need to do something else to make it work for my custom connector?

Thanks!
Loknathsatyasaivarma Mahali 2,740 Reputation points Microsoft External Staff Moderator

2025-03-25T18:34:51.2033333+00:00

Hello Emil Blohmé,

Custom Connectors don’t automatically use the Hybrid Connection for network access. You'll need to ensure that the endpoint you're using for the Custom Connector is resolvable, that it’s routed correctly through your hybrid connection, and that the On-Premises Data Gateway or Hybrid Connection Manager is properly configured.

Also, please make a try on the below Potential Workaround:

Create a proxy or a gateway endpoint (either as part of a Logic App with an HTTP action or as a small service on-prem), which your Custom Connector could use to make the request indirectly. This would bypass the limitations you're encountering with direct Hybrid Connection use.
Loknathsatyasaivarma Mahali 2,740 Reputation points Microsoft External Staff Moderator

2025-03-27T19:20:49.3666667+00:00

Hello Emil Blohmé,

Following up to see if the information provided above was helpful. If you have any additional concerns regarding this matter, please feel free to share them here.
Loknathsatyasaivarma Mahali 2,740 Reputation points Microsoft External Staff Moderator

2025-03-28T21:37:42.6466667+00:00

Hello Emil Blohmé,

We wanted to follow up on the issue you encountered. Please let us know if it's resolved or if you need further assistance.
Emil Blohmé 20 Reputation points

2025-03-31T11:21:18.3233333+00:00

Hello! Sorry for not responding. It still doesn't work. You wrote the following:
*You'll need to ensure that the endpoint you're using for the Custom Connector is resolvable, that it’s routed correctly through your hybrid connection, and that the On-Premises Data Gateway or Hybrid Connection Manager is properly configured.
*
How do I make sure that the Custom Connector is routed correctly through my hybrid connection? The hybrid connection is properly configured. I can use the hybrid connection without any issues using HTTP action in my Logic app. But when I use the Custom Connector (which is setup against the same endpoint as the HTTP action) it doesn't work.

BR,

Emil
Emil Blohmé 20 Reputation points

2025-04-01T06:15:05.35+00:00

Hello @Loknathsatyasaivarma Mahali
Okay, thanks for your help.

Accepted answer

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Your answer

Loknathsatyasaivarma Mahali 2,740 Reputation points Microsoft External Staff Moderator

2025-03-24T18:12:06.2166667+00:00

Hello Emil Blohmé,

Yes, it is possible to use a Hybrid connection with Azure Logic Apps alongside a custom connector. The Hybrid connection allows you to securely connect to on-premises resources, and it can be used in conjunction with custom connectors you create for your Logic Apps. While the HTTP action is commonly associated with Hybrid connections, custom connectors can also leverage these connections to access on-premises resources.

Also refer to this document for better understanding.
Emil Blohmé 20 Reputation points

2025-03-25T07:37:57.7766667+00:00

Hello!
Thanks for a quick response. I tried creating a custom connector for one of our on-prem systems api. I have also added the hybrid connection to the hybrid connection manager. When running the api with a HTTP action in a logic app everything works fine but when I run my custom connector towards the same host I get the error message "The remote name could not be resolved". I read the document that you provided but can't find anything about hybrid connection in it. Do I need to do something else to make it work for my custom connector?

Thanks!
Loknathsatyasaivarma Mahali 2,740 Reputation points Microsoft External Staff Moderator

2025-03-25T18:34:51.2033333+00:00

Hello Emil Blohmé,

Custom Connectors don’t automatically use the Hybrid Connection for network access. You'll need to ensure that the endpoint you're using for the Custom Connector is resolvable, that it’s routed correctly through your hybrid connection, and that the On-Premises Data Gateway or Hybrid Connection Manager is properly configured.

Also, please make a try on the below Potential Workaround:

Create a proxy or a gateway endpoint (either as part of a Logic App with an HTTP action or as a small service on-prem), which your Custom Connector could use to make the request indirectly. This would bypass the limitations you're encountering with direct Hybrid Connection use.
Loknathsatyasaivarma Mahali 2,740 Reputation points Microsoft External Staff Moderator

2025-03-27T19:20:49.3666667+00:00

Hello Emil Blohmé,

Following up to see if the information provided above was helpful. If you have any additional concerns regarding this matter, please feel free to share them here.
Loknathsatyasaivarma Mahali 2,740 Reputation points Microsoft External Staff Moderator

2025-03-28T21:37:42.6466667+00:00

Hello Emil Blohmé,

We wanted to follow up on the issue you encountered. Please let us know if it's resolved or if you need further assistance.
Emil Blohmé 20 Reputation points

2025-03-31T11:21:18.3233333+00:00

Hello! Sorry for not responding. It still doesn't work. You wrote the following:
*You'll need to ensure that the endpoint you're using for the Custom Connector is resolvable, that it’s routed correctly through your hybrid connection, and that the On-Premises Data Gateway or Hybrid Connection Manager is properly configured.
*
How do I make sure that the Custom Connector is routed correctly through my hybrid connection? The hybrid connection is properly configured. I can use the hybrid connection without any issues using HTTP action in my Logic app. But when I use the Custom Connector (which is setup against the same endpoint as the HTTP action) it doesn't work.

BR,

Emil
Emil Blohmé 20 Reputation points

2025-04-01T06:15:05.35+00:00

Hello @Loknathsatyasaivarma Mahali
Okay, thanks for your help.

Answer 1

Hello Emil Blohmé,

Directly routing a custom connector through a Hybrid Connection is not a built-in feature of Azure Logic Apps. While the HTTP action provides explicit integration with Hybrid Connections, allowing direct communication with on-premises resources, custom connectors operate at a higher abstraction level, relying on the Logic Apps runtime's network context. Consequently, there's no inherent setting within a custom connector to specify a Hybrid Connection.

To bridge this gap, the most reliable approach is to implement a proxy or gateway service. This intermediary service, such as a Logic App proxy, Azure Function, API Management instance, or an on-premises web service, utilizes the HTTP action with the configured Hybrid Connection to forward requests from the custom connector to the intended on-premises endpoint.

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Logic app - Hybrid connection and Custom connector

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