Hi anonymous user,
The similar question has been answered over here:
https://learn.microsoft.com/en-us/answers/questions/732/difference-with-microsoft-tech-community.html
The current scope is to move customers from MSDN and TechNet forums to Microsoft Q&A. Other platforms will co-exist, and we will look at ways to consolidate and share content between the different sites. So if you are collaborating in MSDN Forums for the services we are onboarding, then we are inviting you to do so in Microsoft Q&A. If you are engaging in Tech Community, you should continue doing so.
This information can also be found over at the Microsoft Q&A FAQ page over here:
https://learn.microsoft.com/en-us/answers/articles/388/microsoft-qa-frequently-asked-questions.html
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Best regards,
Leon