Both for reporting errors/bugs and asking for additional features to enable our scenarios
Please see Azure IoT support and help options page for information about all of our IoT support options. For the SDKs specifically, you can file an issue in any of our repos (C, C#, Java, Node, Python) or file a feature request on UserVoice. Please be sure to check existing issues and feature requests and upvote/comment on ones to raise their visibility to us.
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