"When the administrator uses a Microsoft account to sign in, the clear key is removed, a recovery key is uploaded to the online Microsoft account..."

Microsoft does not break down requests by key disclosure, but they do say in their most recent report for 2022 H2 that they released account content for 522 requests to US criminal authorities in that half. It does not note how many accounts were included in those 522 requests.[2]

[1] https://learn.microsoft.com/en-us/windows/security/operating...

[2] https://www.microsoft.com/en-us/corporate-responsibility/law...