Hello,
Thank you for posting in the Microsoft community forum.
I understand that your document orientation on your Windows remote device does not match the printer Settings on your Mac client, but it works fine during print preview.
It is recommended that you first confirm that the orientation setting for Print Preferences is set to landscape. Also make sure you have the latest printer drivers installed on both your remote Windows computer and your local Mac.
How to download and install the latest printer drivers - Microsoft Support
If you have completed these steps and the problem persists, it may be a specific compatibility issue between the remote desktop application or driver for Mac and the Windows RD environment. I strongly recommend that you submit this symptom through the feedback feature of the Mac Remote desktop application. This is the most effective way for users like you to communicate with product engineers, to help them notice problems, and to help fix them in future releases.
Thank you for your understanding and cooperation.
Best regards
Jacen