setheader not allowed for 'content-length' header parameter.

[nmamidip]

When calling the Azure File Share REST API using a custom connector in Power Automate to create a blank file with the PUT method, the request must include the header Content-Length: 0. However, Power Automate automatically assumes an empty body ({}) and sets Content-Length: 2. This causes the API to reject the request with a 400 Bad Request error. How to overcome this issue.

[troystaylor]

Are you setting the parameter as part of an operation or with a policy? I would assume the policy would overwrite the empty body.

https://learn.microsoft.com/en-us/connectors/custom-connectors/policy-templates/setheader/setheader

[nmamidip]

Setting the parameter with a policy and it says Content-Length is an restricted header that can't be overridden.

[troystaylor]

Please try the following custom code instead of the policy:
https://github.com/troystaylor/Connector-Code/tree/main/Set%20Content-Length%20Header