Microsoft Password Manager is the password feature built into the Microsoft Edge web browser. It combines a password generator, which suggests and saves a strong password when you create an account, Password Monitor, which compares saved credentials against known leaked ones, and Password Health, which shows reused or weak passwords. Users who are signed in and syncing get passwords filled in automatically on all their devices. No separate installation is needed; it is part of the browser.
Edge and its password manager come from Microsoft, headquartered in the United States, so US jurisdiction and the CLOUD Act apply. According to Microsoft the leak check is encrypted and only the user can see which passwords are flagged. Where synced passwords are stored and how they are encrypted is not stated. It is a feature of one browser rather than a standalone product, and availability varies by device, market and version. Organisations with strict requirements on control over credentials may consider a self-hosted or European password manager.