When publishing the Microsoft Dynamics NAV 2016 webclient clients users receive an error when they want to upload files. During the upload process the client's browser downloads a DynamicFileUpload.axd file and the Dynamics NAV webclient crashes. This only happens when publishing the NAV webclient though UTM. When doing a DNAT to the webclient server directly it works fine. The issue seems to be UTM.
When using Microsoft WAP from Windows Server 2016 and DNAT'ting to this server it also works fine, but I'd rather use UTM due to the extra checks and safety.
Any idea on how to get this working? I've also tried publishing without any firewall profile, but this doesn't solve the issue.
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