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Microsoft 365 Certified: Endpoint Administrator Associate · Microsoft
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According to Microsoft’s documentation on https://learn.microsoft.com/en-us/entra/identity/authentication/howto-authentication-passwordless-phone, Android supports multiple accounts for passwordless authentication on the same device, which is essential when users need to authenticate to two different Microsoft 365 tenants. iOS supports passwordless sign-in but only for one account per device, so it does not meet the requirement. Windows and macOS do not use Microsoft Authenticator for passwordless sign-in; they rely on other methods like Windows Hello for Business.
While both iOS and Android support Microsoft Authenticator, iOS currently offers broader, more stable support for managing multiple accounts across different tenants with passwordless sign-in. That said, both mobile platforms are generally recommended over desktop ones (like Windows and macOS) for this use case. So if it comes to choosing between Android and iOS, it should be iOS.
You can enable passwordless phone sign-in for multiple accounts in Microsoft Authenticator on any supported Android or iOS device this Q is obsolete