Why is my server getting thousands of requests for non-existent files from MS IP addresses?

[Microsoft Windows]

My logs are showing lots of requests like the following from at least a dozen IP addresses starting with 52.169. which all seem to be MS ones. (Example below)These requests don't have any identifier such as BingBot. How can I ask MS to stop making these requests as they do at times slow my server down and cost me money? What are the addresses used for? If I block them am I blocking genuine traffic too?2025-02-21 09:34:37 W3SVC1 GET /flower.php - 52.169.93.189 - - 404 7 0 152025-02-21 09:34:37 W3SVC1 GET /admin.php - 52.169.93.189 - - 404 7 0 02025-02-21 09:34:37 W3SVC1 GET /file.php - 52.169.9

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