What is multi-factor authentication (MFA) and why your business needs it

Stolen or weak passwords are still the easiest way into a company’s systems. Attackers don’t need to “hack” you if they can simply log in! MFA closes that door by demanding extra proof that the person entering a password is genuinely who they claim to be.

Multi-factor authentication (MFA) has been a part of robust cyber security for a while now. But many businesses are still yet to join the MFA security party! In our nifty blog, we’ll explain what MFA is, why it’s indispensable for modern organisations, and how to roll it out without derailing your workflows.

What is multi-factor authentication?

At its core, MFA (often called two-step verification or two-factor authentication when two factors are used) requires users to prove their identity using at least two independent factors drawn from different categories:

• Something you know like a password or PIN
• Something you have like a a phone, hardware security key, smart card, authenticator app
• Something you are like a biometric such as a fingerprint or Face ID
• Somewhere you are / something you do like a location, behaviour or device risk signals (in more advanced deployments)

Because an attacker would need to compromise multiple, distinct factors at once, the likelihood of a successful account takeover decreases. Even if a password leaks in a breach or via phishing, the second (or third) factor blocks the intruder. Geddit?

Why MFA security matters for SMEs and enterprises

Cyber attackers weaponise automated credential stuffing, phishing kits and dark‑web password dumps to break into businesses of every size.

But MFA security dramatically reduces the risk from these tactics because a stolen password on its own is no longer enough.

Plus, there are additional benefits that go beyond just the initial risk management of MFA:

• Regulatory alignment: many frameworks and cyber insurance policies either recommend or now require MFA for remote access, privileged accounts and key SaaS platforms.
• Containment of phishing: even when a user is tricked into entering their credentials, an additional factor (especially a hardware key or number-matching prompt) can stop the attacker from completing the login.
• Zero trust enablement: strong identity proofing is a pillar of ‘zero trust’ architectures. Without it, every other control is weaker.

How to plan your business MFA setup

Rolling out MFA doesn’t have to be difficult or confusing. The key is to treat it like any other business improvement project, breaking it down into manageable steps:

1. Make a list of everything that needs protecting

Start by writing down every system and app your business uses. Including both cloud-based (like Microsoft 365 or Salesforce) and on-site (like your company servers). Don’t forget about things like VPNs for remote access, remote desktop tools, and older systems that may still use outdated sign-in methods. Also, list all the important user accounts, especially those with special access or permissions.

2. Prioritise the biggest risks first

Not every system or user needs the same level of security right away. Focus first on the most sensitive areas, like admin accounts, finance systems, remote access tools, and anything that handles customer or personal data. These are the places attackers are most likely to target.

3. Choose the right tools and methods for your business

There are lots of MFA options out there. Some common ones include apps that generate login codes, physical keys (like USB security devices), fingerprint or face recognition, and even passkeys built into your phone or computer. SMS texts can be used too, but only as a temporary backup because they’re not as secure. You’ll also want to decide which provider or platform you’ll use to manage it all, like Microsoft Entra ID or Okta.

4. Decide who needs MFA and when

Will everyone use MFA from day one? Or will you roll it out to high-risk users first? You can also set smart rules so that people only get asked for MFA when it’s really needed, like logging in from a new country or device. This makes things more secure and user-friendly.

5. Connect MFA with your single sign-on (SSO)

If your business uses a central login system (SSO), try to connect MFA to that. It means you won’t have to set up MFA individually on every single app, saving you time and keeping things consistent for users.

6. Keep everyone informed

Start communicating early. Let staff know what’s coming, why it matters, and how it will protect them as well as the business. Use simple, step-by-step guides (with visuals) to help them get started.

7. Test your business MFA setup with a small group first

Before launching company-wide, do a trial run with a small group. For example, the IT team or a few employees from different departments. This helps uncover any unexpected issues (e.g. older devices, scanners, or apps that don’t support modern security features) and gives you time to fix them before everyone starts using it.

8. Help staff get set up

Not everyone is tech-savvy, so offer hands-on help. You could run short training sessions, offer video walkthroughs, or have someone available to help on-site for the first few days. This cuts down on confusion and reduces support calls to the IT team.

9. Track how it’s going and keep improving

Once MFA is live, don’t forget to monitor how things are going. Keep an eye on how many people have enrolled, how often they request bypasses or get locked out, and which methods are most popular. Use this feedback to improve your setup, tighten security over time, and make the experience better for your teams.

Business MFA setup in 7 days

So, it’s time to get started at your business! Here’s what a quick but safe 7-day rollout could look like:

• Day 1–2: Start by assessing your risks and defining what’s in scope. Look at things like which users, systems and data need protection. Then sketch out your MFA policy: who gets it first, what factors you’ll use, and which methods to support.
• Day 3: Configure your identity provider or single sign-on (SSO) platform, and choose your default MFA options. For example, authenticator apps, biometrics or passkeys.
• Day 4: Run a pilot with IT staff and system administrators. Make sure MFA works smoothly, identify any compatibility issues, and fix any obvious gaps.
• Day 5: Roll out clear communication to the rest of the business. Share simple self-enrolment instructions and FAQs so staff know what to expect and how to get started.
• Day 6: Begin rollout with the highest-risk groups, such as admins, remote workers or finance teams. This allows you to catch any remaining issues before everyone is onboarded.
• Day 7: Complete full rollout across the organisation. Provide support, monitor enrolment rates and issues, and be ready to adjust as needed.

Best‑practice tips to maximise MFA security

Use phishing-resistant methods for high-risk users

Instead of relying on standard text message codes or simple app prompts, give your administrators and high-risk users something much harder to fake, like a physical security key (e.g., a USB device) or a built-in method like Face ID or passkeys. These options are far more secure against phishing scams.

Enable number matching or app verification codes

Some attackers try to overwhelm users by repeatedly sending login notifications (“push-spam”) hoping the user will approve one by mistake. Number matching means the user has to type in or confirm a number, stopping accidental approvals.

Step up security when things look suspicious

Set policies that demand extra verification if someone tries to log in from a new country, on a different device, or under other unusual circumstances. Think of it like your bank flagging a strange purchase.

Set up secure backup options, but carefully

Make sure users have a safe way to recover access if they lose their phone or security key, such as backup codes or alternate devices. However, don’t rely too much on SMS text messages for this. Hackers can sometimes hijack phone numbers through SIM-swapping scams.

Watch for warning signs

Keep an eye out for strange patterns like users receiving multiple login prompts they didn’t request or repeated failed attempts. These can be early signs that someone is trying to break in.

Protect admin and system accounts first

Accounts with special access or control over your systems are the most dangerous if compromised. Make these your top priority when rolling out strong MFA protections.

Myth-busting people’s objections to MFA

Sometimes people think that MFA is just a big faff. Or that it doesn’t really make any difference, anyway! Sadly, these misconceptions can both lead to businesses living with cyber security vulnerabilities that can have massive consequences, as well as staff resistance within workplaces that are actively trying to implement MFA.

Let’s take a look at some common objections:

“MFA slows people down.” Most users authenticate a handful of times per day. App‑based prompts, Windows Hello, Touch ID or passkeys are actually extremely quick. The seconds you spend using MFA services is worth it when you compare it to the time, money, stress and company downtime that may occur in the event of a data breach.

“SMS codes are enough, right?” SMS is better than nothing, but it’s vulnerable to SIM swapping and interception. It’s best to use it as a stop‑gap on the way to stronger factors.

“We can’t enable it on our legacy systems.” Older systems that don’t support MFA directly can still be protected. You can place them behind a secure login layer (like a VPN, modern login system, or security gateway) that checks MFA before letting anyone in. If the system really can’t be changed, keep it isolated from the rest of your network and closely monitor it for any unusual activity.

“Our executives will never accept it.” Executives are prime targets for BEC (Business Email Compromise). It’s best to explain this to them, and make sure they understand their personal responsibility to be cyber secure. Give them the best user experience (e.g., passkeys/hardware keys) and make it as convenient as possible for them during the onboarding process.

Our top 5 MFA tools

If you’re ready to implement multi-factor authentication, here are five of the most popular and trusted MFA security tools to include in your business MFA setup:

1. Microsoft Entra ID

Formerly Azure AD, this is a leading identity and access management platform with built-in MFA, conditional access, and single sign-on. Ideal for businesses already using Microsoft 365.

2. Google Workspace / Google Authenticator

Google’s admin tools support MFA for all users and integrate seamlessly with Google Authenticator, a free app for generating time-based login codes.

3. Okta

A widely used identity provider with flexible MFA options, including biometrics, push notifications, and passkeys. It’s known for easy integration with thousands of SaaS apps.

4. Duo Security (by Cisco)

Popular for its simple interface and strong MFA security features like push-based authentication, device trust, and granular policy control.

5. YubiKey (by Yubico)

A physical hardware key offering phishing-resistant authentication. Works with many platforms, including Google, Microsoft, and popular password managers.

Get started today!

Getting your business set up with multi-factor authentication is one of the highest ‘return on investment’ security controls your organisation can implement. It’s fast to deploy, cheap (compared to a cyber breach!), and hugely effective at blocking account takeover. Whether you start with authenticator apps or jump straight to passkeys and hardware tokens, the key is to just begin somewhere. Design a sensible business MFA setup, socialise the change within your company, and keep improving as you learn!

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