Hello @이기태 이사,
Thank you for taking time to post your question in Microsoft Q&A forum.
First of all, different Visual Studio product keys activate different versions of Visual Studio. The product key for VS 2022 Professional cannot activate VS 2017 Professional.
If you only have a product key but don’t have a subscription license, it’s not possible to activate a previous/other version of VS.
Secondly, for subscription license, using an earlier version of Visual Studio is possible. You can download an Excel file to check which earlier versions of Visual Studio can be used for the specific subscription license(details: https://visualstudio.microsoft.com/vs/pricing-details/).
Thirdly, about your first and second question, please kindly contact Visual Studio Subscription Team(retail/sales) for double confirmation.
Please don’t hesitate to let us know if you have any further concerns.
Have a nice day.
Sincerely,
Tianyu
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