Why Microsoft's Passkeys on Windows Matter for Indian SMBs

What Happened

Microsoft announced in late April 2026 that it will begin rolling out passkey support for Microsoft Entra-protected resources directly on Windows devices. This marks a significant shift in how organizations will authenticate users—moving away from traditional passwords and multi-factor authentication (MFA) codes toward phishing-resistant passwordless authentication.

The rollout, starting late April, enables Windows users to log into Microsoft 365, Azure, and other Entra-protected services using biometric authentication (fingerprint, face recognition) or hardware security keys, eliminating the need to type passwords or enter time-based codes. This is part of Microsoft's broader commitment to eliminate passwords entirely from the enterprise ecosystem.

Passkeys work by generating cryptographic key pairs—one public, one private—that are stored securely on the user's device (or a hardware key). When authenticating, the device proves possession of the private key without ever transmitting it over the network. This makes passkeys fundamentally immune to phishing attacks, credential stuffing, and password reuse vulnerabilities that plague traditional authentication.

The rollout applies to Windows 10 and Windows 11 devices, and Microsoft is positioning this as the default authentication method for new Entra deployments. Organizations with existing Entra tenants can opt into passkey support during the rollout period.

Why This Matters for Indian Businesses

If you're running an Indian SMB with cloud infrastructure, this announcement should land on your radar—here's why.

First, the DPDP Act (Digital Personal Data Protection Act) came into force in August 2023, and it mandates that organizations implement reasonable security measures to protect personal data. The Act doesn't prescribe specific technologies, but it does require you to demonstrate that your authentication mechanisms meet industry standards. Passkeys exceed those standards significantly—they eliminate one of the most common attack vectors regulators and auditors scrutinize: weak password hygiene.

Second, India's CERT-In (Indian Computer Emergency Response Team) has a 6-hour incident disclosure mandate. If your organization suffers a credential compromise due to phishing or password reuse, you're legally required to notify CERT-In within 6 hours. Passkeys reduce this risk substantially. In my years building enterprise systems, I've seen this pattern repeatedly: the majority of breaches start with compromised credentials. If you eliminate passwords, you eliminate the attack surface.

Third, the RBI's guidelines on cybersecurity (for fintech and banking-adjacent businesses) emphasize multi-factor authentication and strong identity controls. Passkeys exceed MFA in security posture—they're not just "something you have + something you know." They're cryptographic proof of identity, resistant to the SIM-swap and OTP-interception attacks that have plagued Indian businesses.

For Indian SMBs specifically, this matters because:

1. Reduced support burden: No more password reset tickets. No more "I forgot my password" calls. IT teams can focus on actual security work.
2. Compliance readiness: Passkeys demonstrate to auditors (and regulators) that you're taking authentication seriously.
3. Phishing resilience: Your employees can't be tricked into entering credentials into a fake login page—passkeys only work on legitimate Microsoft domains.
4. Competitive advantage: If you're bidding for enterprise contracts, passkey-enabled authentication is increasingly a requirement in RFPs.

Technical Breakdown: How Passkeys Work

Let me walk you through the mechanics, because understanding this will help you plan your rollout.

graph TD
    A[User Initiates Login] -->|Requests passkey| B[Windows Device]
    B -->|Cryptographic Challenge| C[Entra Server]
    C -->|Sends Challenge| D[User Device]
    D -->|Biometric/PIN| E[Private Key Unlocked]
    E -->|Signs Challenge| F[Proof Sent to Entra]
    F -->|Validates Signature| G[Access Granted]
    G -->|No Password Transmitted| H[Session Created]

Here's what happens under the hood:

1. Enrollment: When you first set up a passkey on Windows, the device generates a public-private key pair. The public key is sent to Microsoft Entra and stored in your account profile. The private key never leaves your device.

1. Authentication Request: When you try to log in, Entra sends a cryptographic challenge to your Windows device.

1. Biometric/PIN Verification: Windows prompts you to verify your identity using Windows Hello (facial recognition, fingerprint) or a PIN. This unlocks the private key stored in the device's Trusted Platform Module (TPM).

1. Signature Generation: Your device signs the challenge using the private key. This signature is mathematically unique—it can't be replayed or forged.

1. Verification: Entra receives the signature, verifies it using the public key on file, and grants access.

Real-World Attack Scenarios Passkeys Prevent

Practical Implementation: Entra Passkey Setup

If you're using Microsoft Entra (formerly Azure AD), here's how to enable passkeys for your organization:

# Connect to Entra PowerShell
Connect-MgGraph -Scopes "Policy.ReadWrite.AuthenticationMethod"

# Enable passkey sign-in for all users
$params = @{
    DisplayName = "Fido2 Key Authentication Method"
    State = "enabled"
}

New-MgPolicyAuthenticationMethodPolicy -BodyParameter $params

# Verify passkey policy is active
Get-MgPolicyAuthenticationMethodPolicy | Select-Object DisplayName, State

For your users, the enrollment is simple:

1. Go to myaccount.microsoft.com → Security info
2. Click Add sign-in method → Passkey
3. Choose Windows device or Security key (hardware key)
4. Complete biometric/PIN verification
5. Done—next login, they'll use the passkey

How to Protect Your Business

Passkeys are a major step forward, but they're not a complete security solution. Here's a layered approach:

Quick Wins You Can Implement Today

1. Enforce Passkey-Only Access for Sensitive Groups

# Create a Conditional Access policy that requires passkeys for admin accounts
$params = @{
    DisplayName = "Require Passkey for Admins"
    State = "enabledForReportingButNotEnforced"
    Conditions = @{
        Users = @{
            IncludeGroups = @("admin-group-id")
        }
        Applications = @{
            IncludeApplications = @("All")
        }
    }
    GrantControls = @{
        Operator = "OR"
        BuiltInControls = @("Mfa")
    }
}

New-MgIdentityConditionalAccessPolicy -BodyParameter $params

2. Set Up Passkey Recovery

Passkeys are device-bound. If a user loses their device, they need a recovery method. Use the Windows Account Recovery Tool or Microsoft Authenticator app as a backup.

3. Monitor Passkey Adoption

# Query passkey enrollment rates
Get-MgUserAuthenticationMethod -UserId "user@company.com" | Where-Object {$_.AuthenticationMethodType -eq "fido2"}

Potential Challenges and How to Address Them

Challenge 1: Legacy Applications

Not all enterprise applications support passkeys yet. You'll need to maintain password-based authentication for legacy systems while rolling out passkeys for modern cloud apps.

Solution: Use a hybrid approach. Enable passkeys for Microsoft 365, Azure, and modern SaaS apps. Keep password-based MFA for legacy systems. Plan a 12-18 month migration timeline.

Challenge 2: Remote Work and Device Diversity

What if an employee works from multiple devices? Or uses a personal laptop?

Solution: Use cloud-synced passkeys via Microsoft Account (for personal devices) or hardware security keys (Yubikey, etc.) that work across devices. Microsoft Entra supports both.

Challenge 3: User Adoption

Not all employees will embrace passwordless authentication immediately.

Solution: Run security training and phishing simulations (we do this at Bachao.AI). Show employees how passkeys are faster and more secure than passwords. Most users adopt within 2-3 weeks once they experience the convenience.

How Bachao.AI Detects This Risk

At Bachao.AI, we've built detection and compliance capabilities specifically for Indian SMBs facing authentication and identity risks. Here's how our products map to the passkey migration:

This is exactly why I built Bachao.AI—to make this kind of protection accessible to Indian SMBs. When I was architecting security for large enterprises, passkey migrations took 6-12 months and cost hundreds of thousands of rupees. SMBs shouldn't have to wait for that expertise to become available.

Book Your Free VAPT Scan → Assess your authentication readiness in 30 minutes

Key Takeaways

1. Passkeys are phishing-proof: They eliminate the largest attack vector in Indian SMBs—compromised credentials.
2. DPDP Act compliance: Passkeys demonstrate reasonable security measures under India's data protection law.
3. Reduced operational burden: No more password resets, no more help desk tickets.
4. Plan your migration: Start with pilot groups, maintain hybrid authentication during transition, use hardware keys for multi-device users.
5. Assess your readiness: Use VAPT scans and cloud security audits to identify gaps before rolling out passkeys.

Originally reported by BleepingComputer

Written by Shouvik Mukherjee, Founder of Bachao.AI. Follow me on LinkedIn for daily cybersecurity insights for Indian businesses.

Written by Shouvik Mukherjee, Founder of Bachao.AI. Follow me on LinkedIn for daily cybersecurity insights for Indian businesses.