Multi-Factor Authentication (MFA) is the single most effective security control UAE businesses can implement to protect Microsoft 365 accounts. Research by Microsoft shows that MFA blocks 99.9% of automated account compromise attacks. For UAE SMEs that store business emails, financial data, client information, and confidential documents in Microsoft 365, enabling MFA is not optional — it is a fundamental security requirement. And yet, many UAE businesses still operate Microsoft 365 without MFA, leaving themselves exposed to credential theft, phishing, and business email compromise attacks every day.
This guide explains how to enable MFA for all users in your Microsoft 365 tenant and how employees should set it up on their devices.
There are two main approaches to enabling MFA in Microsoft 365: Security Defaults and Conditional Access policies.
Option 1 — Security Defaults (recommended for smaller businesses): Security Defaults is the easiest way to enable MFA for all users. Sign in to the Microsoft Entra admin center (entra.microsoft.com) as a Global Administrator. Go to Identity > Overview > Properties > Manage Security Defaults. Toggle "Security Defaults" to Enabled and save. All users will now be required to register for MFA within 14 days and complete MFA verification on subsequent logins. This is the quickest way to protect your organisation.
Option 2 — Conditional Access (recommended for Microsoft 365 Business Premium): Conditional Access provides more granular control — requiring MFA only from certain locations, only for certain applications, or only for certain user groups. To configure, go to the Microsoft Entra admin center, select Protection > Conditional Access, and create a new policy. Conditional Access requires at least Microsoft 365 Business Premium or Azure AD P1 licences. Al Aida IT configures Conditional Access policies for clients under our IT AMC programme in Dubai and Abu Dhabi for more tailored security control.
When MFA is first enabled, users will be prompted to set it up on their next login. They will be directed to aka.ms/MFASetup. The recommended MFA method is the Microsoft Authenticator app (free, available on iOS and Android). Download the app, select "Add account", choose "Work or school account", and scan the QR code shown on screen. Future logins will show a notification on your phone that you approve with a number match for security.
Alternative MFA methods include SMS text message to a registered UAE mobile number (Etisalat or du number) or a phone call. The Authenticator app is strongly preferred over SMS as it is more resistant to SIM swap attacks.
If you get a new phone and need to set up the Microsoft Authenticator app again, you must contact your IT administrator before disposing of the old phone. They will need to clear your MFA registration in Microsoft Entra ID so you can re-register. If you registered backup methods (such as a phone number), you may be able to recover access yourself. This is a common support request — Al Aida IT handles MFA re-registrations for clients regularly across Dubai and the UAE.
If your business needs help enabling MFA and securing Microsoft 365 accounts in the UAE, our team at Al Aida IT Technology LLC provides expert managed IT support, Microsoft 365 security, and IT Annual Maintenance Contracts (AMCs) across Dubai, Abu Dhabi, Sharjah, and the wider GCC region.
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