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Microsoft Tech Community: Upgrade complete
RSS Feed issue can be mitigated by following the information here:
Aurora Update RSS feed work-around | Microsoft Community Hub
The RSS feed has problems. I've been using my RSS reader for many years with the many MSFT blogs I follow. This update has broken things.
One is how images no longer work. Looks like they've all been turned into buttons, which should work in a RSS reader but something is broken in how it's been done at your sites.
The feeds have several compatibility issues. Check at the W3C validator results.
https://validator.w3.org/feed/check.cgi?url=https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fs%2Fgxcuf89792%2Frss%2Fboard%3Fboard.id%3DAzure-AI-Services-blog
https://validator.w3.org/feed/check.cgi?url=https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fs%2Fgxcuf89792%2Frss%2Fboard%3Fboard.id%3DDefenderThreatIntelligence