Test connection failed HTTP return status code was 400
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05-27-2026 10:22 AM
Is there any reason why an unused connection would give this error when trying to use it out of the blue. The last time it was used it was successful, about 2 to 3 weeks ago. I am using SGC for Microsoft Intune. I have disabled all scheduled configurations because I do not want to inadvertently pull back all CIs from Intune while modifying workflow configs.
Alert level: Critical.
Test connection failed.
Reason: Unable to make a connection to Intune API call. Please check your credential configuration. Check system log for more details. HTTP return status code was 400
Suggested solution: Indicates an error has occured. Further debugging is required.
