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Control Device Access and Approve Only Trusted Devices for MS Office 365


Managing device access in Microsoft 365 is essential for safeguarding your organization’s sensitive data. By enabling admin approval, businesses can ensure that only trusted devices connect to Outlook, OneDrive, Word, Excel, PowerPoint, Teams, and SharePoint. This helps prevent unauthorized access, reduces security risks, and supports compliance without slowing down employee productivity.

With miniOrange CASB, IT teams can enforce device approval policies, block unmanaged or risky devices, and gain full visibility into device activity across all Microsoft 365 apps. The result is a secure and flexible Microsoft 365 environment where employees can work seamlessly on approved devices while your company’s data remains fully protected.


Configuring Admin approval for device access and restrictions on MS Office 365

Step 1: Sign Up and Access the miniOrange CASB Dashboard

  • Click here to log in to CASB Dashboard.
  • (Don't have an account? No worries, click here to create a new account.)
  • CASB Dashboard Login for Google Workspace Device Approval

  • Go to your miniOrange CASB dashboard.
  • CASB Admin Dashboard for Device Management

Step 2: Enable Admin Device Approval and Device Restrictions for MS 365

  • Go to Manage Policy and create or select the Device Restriction policy and give it a clear name and description.
  • In the Network Based Restriction section, configure the following settings:
    • a.) Approver Notification Email
      Enter the security admin and manager emails, to approve when new devices are enrolled and request access to Microsoft 365.

      Device-Based Restriction Settings in CASB

      b.) Out of Network Mac Validation
      Enter the list of approved networks from which devices can be allowed access to Microsoft 365.

      MAC Address Validation Settings for Network Access

      c.) Whitelisted Mac Address
      When employees need to use their personal devices, whitelist their Mac Addresses to allow them access to Microsoft 365.

      Whitelisted MAC Addresses Configuration


Why is Admin Approval for Device Access and Restrictions needed?

Not every device trying to access Microsoft 365 is safe, and some devices may not meet your company's security standards. Without proper controls, sensitive business data can end up on unknown, unmanaged, or compromised devices.

By enabling Microsoft 365 device approval and restriction for company and BYOD, you ensure that only trusted devices can connect to Outlook, OneDrive, Word, Excel, PowerPoint, Teams, and SharePoint. Company devices can be approved quickly, while personal devices require review before gaining access. This prevents data leaks, stops unauthorized logins, and gives IT admins full visibility into device activity across the organization.

Admin approval is also critical for businesses that follow compliance rules. It ensures that only secure and verified devices are allowed to access Microsoft 365, reducing risks while maintaining employee productivity.

Top risks without admin approval

  • Company data accessed from lost or stolen personal devices
  • Unauthorized logins from unknown or unmanaged laptops
  • Employees storing work files on unsafe or unencrypted devices
  • Higher chances of data leaks and compliance violations
  • No visibility for admins into which devices are being used

Benefits of miniOrange CASB for securing Microsoft 365

miniOrange CASB adds an extra layer of security by ensuring that only approved devices and trusted users can access Microsoft 365 apps. It combines simple controls with strong protection so your team can stay productive without risking company data.

Key benefits of miniOrange CASB

  • Stronger access control – Allow only approved devices, whether company-owned or personal, after admin review.
  • Simplified BYOD management – Support flexible work while ensuring personal devices meet your security requirements.
  • Reduced data leaks – Block risky devices and protect sensitive files in OneDrive, Outlook, Word, Excel, PowerPoint, Teams, and SharePoint.
  • Compliance support – Meet industry regulations by enforcing security policies for device access.
  • Better visibility for admins – Track, monitor, and control every device connecting to Microsoft 365.
  • Seamless employee experience – Give staff easy access to trusted devices without unnecessary restrictions.

With miniOrange CASB, you gain peace of mind knowing your Microsoft 365 environment is secure and employee-friendly.


Real World Scenario: How miniOrange CASB secures MS Office 365 with Device Approvals

A company relies on Microsoft 365 apps such as Outlook, OneDrive, MS Teams, and SharePoint to manage sensitive business data. With employees using personal devices and independent consultants accessing company accounts on their computers, it can be challenging to control who is logging in and whether these devices are secure. Without proper oversight, unauthorized access and potential data breaches become a real risk.

Problem Statement

Traditional Microsoft 365 security policies cannot guarantee that only approved devices connect. Employees may log in from personal phones or computers without security verification, and contractors may use unmanaged or outdated devices. This increases the likelihood of data leaks, unauthorized file sharing, and compliance violations.

Solution

miniOrange CASB introduces device approval policies that give IT admins complete control over who accesses Microsoft 365 and from which device.

  • For BYOD (Bring Your Own Device): Personal devices require admin approval before accessing apps like Outlook, OneDrive, Word, Excel, PowerPoint, Teams, and SharePoint. This ensures flexibility for employees while maintaining strong data security.
  • For Unmanaged or Risky Devices: miniOrange CASB blocks devices that do not meet security requirements or routes them for admin review, preventing unauthorized or unsafe logins.

With real-time monitoring, IT admins gain full visibility into every device attempting to connect. Suspicious login attempts from unverified devices trigger alerts, enabling the security team to act immediately. This helps businesses protect sensitive Microsoft 365 data while supporting a flexible and modern workforce.


Summary

Controlling device access in Microsoft 365 is essential to protect sensitive business information. By requiring admin approval, companies can ensure that only trusted devices connect to Outlook, OneDrive, MS Teams, and SharePoint. This approach reduces risks, prevents unauthorized logins, and supports compliance without interrupting productivity.

With miniOrange CASB, organizations can enforce device approvals, block risky devices, and give IT admins full visibility into user activity across all Microsoft 365 apps. The result is a secure and flexible Microsoft 365 environment, keeping emails, files, and collaboration tools safe at all times.


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