Quick guide (in a single picture) how to properly setup remote desktop connection using Microsoft Remote Desktop software on Mac OS X:
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- Don't use old Remote Desktop Connection software Mac OS X version 10.10.x and higher! Use Microsoft Remote Desktop from App Store instead.
- Don't add domain or PC name with back slash into username! Put just a login name, official instruction is wrong.
- Specify the port number in the connection filed! Different RDC protocols uses different port numbers by default.