How to Protect Your Mobile Devices with Microsoft Defender — Included in Your Microsoft 365 Business Premium Plan
A two-minute setup that saves you from a thousand headaches. Future you will send a thank-you email.
Why you need mobile protection
Your smartphone and tablet hold sensitive work emails, client data, and business files — which makes them attractive to attackers. A single tap on a phishing link can compromise your account and put company data at risk.
- Real-time threat scanning — Detects and blocks malware, spyware, and malicious downloads.
- Web protection — Stops dangerous or fraudulent websites before they load.
- Security alerts — Notifies you immediately if something suspicious appears.
- Microsoft 365 integration — Uses your existing work account and security policies.
Microsoft Defender leverages Microsoft’s cloud threat intelligence and is trusted by millions of businesses worldwide.
Install & activate in four steps
- Download the app
iPhone/iPad: App Store link
Android: Google Play link - Sign in with your work account
Use the same email and password you use for Outlook or Teams. Approve multi-factor authentication if prompted. - Grant permissions
Follow the prompts to enable scanning and protection. - Stay protected
Defender runs in the background, blocking threats and warning you about risks automatically.
Already on Microsoft 365 Business Premium? There’s no extra cost — just install, sign in, and you’re covered.
Quick facts
- Works on iOS and Android.
- Uses the same login as your Microsoft 365 account.
- Plays nicely with mobile device management (MDM).
- Web protection helps block phishing links in email and SMS.
Tip for administrators
Using Microsoft Intune? You can require Defender as part of compliance, and block access for devices that aren’t protected.
Need a hand?
Our team can walk you through setup or bulk deployment for staff.
© 2025 Computer Services Ltd. This article is provided for general guidance. Always follow your organisation's security policies.