My app failed in the store for DPIAwareness like this post
The only manifest file I got is Package.appxmanifest. Do I need to set dpi aware flag in this file or elsewhere?
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Yes, please try the document @RichardZhang-MSFT provided first.
If you still have the problem, please open a support ticket here: Contact Us. Choose to Contact us, select Dashboard for Topic and select App Certification failures for issue type.
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