Hi. Thank you for your question and reaching out. I’d be more than happy to help you with your query
I have linked an article below that may help solve your issue. Here is what the article has to say:
When it then connected and did not impede the Creation of user accounts, all RemoteApp apps were entirely deleted and reinstalled. Normally, I would just expect to have to replace one software, but I believe a vital RDP component had to be reinstalled.
You can also check this thread that has the similar issue with you https://social.technet.microsoft.com/Forums/azure/en-US/fa7ef553-697b-40dd-b252-3868955dd277/error-this-rdp-file-is-corrupted-the-remote-connection-cannot-be-started?forum=winserverTS
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