Microsoft 365 Security: Protect Your Data and Your Business

Microsoft 365 is the ultimate cloud solution for centralizing messaging, file sharing, collaboration, andremote work. SMBs leverage various Microsoft collaboration services and tools such as Exchange Online, SharePoint, OneDrive, and Teams, to name a few.

However, even though Microsoft products have an excellent reputation for security, moving to the cloud is not without risk. Without the right configuration, SMBs expose their critical data to the risk of cyberattacks, loss, or unauthorized access.

In this article, we explore the 10 best practices for strengthening Microsoft 365 security, ensuring the protection of sensitive data, and reducing business risks.

1. Enable Multi-Factor Authentication (MFA)

💡Did You Know?

• 99,2 % of attacks aimed at compromising an account can be easily blocked by enabling MFA. (Source : Microsoft, august 2025) 

• 99,9 % of compromised accounts do not use multi-factor authentication. (Source : Microsoft, january 2025) 

These statistics clearly show that implementing MFA is the most effective security measure for reducing the risk of your SMB’s Microsoft 365 accounts being compromised.

Requiring a second factor of authentication, such as a code received via an authentication app, can prevent attackers from accessing your accounts, even if your password is compromised.

Best Practices:

Prioritize the use of a multi-factor authentication app when available, as methods such as SMS, email, or phone calls are more likely to be hijacked by a malicious actor.
Enable MFA for all accounts, including administrators and standard users.
In addition to multi-factor authentication, other methods can be added. For example, conditional access routes, user risk level, and device-based trust are good examples.

2. Secure Your Administrator Accounts

Your global administrator accounts provide access to your entire Microsoft 365 environment.

For a hacker, it’s like a master key. For SMB, it’s a risk of massive data theft and operational disruptions.

Best Practices:

Never use a global admin account for your daily tasks.
Create just-in-time (JIT) administrator accounts — for example, ited uses identity and access management (IAM) solutions to create these accounts.
Limit the number of administrator accounts and their use to the absolute minimum.
Enable security auditing and logging to track all administrator actions.

💡Tip for SMBs
Ensure that all your administrator accounts use MFA and a unique password, stored in an enterprise password manager. 

3. Set Up Basic Security Using the Right Tools

To ensure your M365 security, you need to build on a solid foundation. ited offers affordable security services and supports companies in selecting and integrating the right tools to secure their Microsoft 365 environment.

Best Practices:

ited offers proactive 24/7 monitoring of your tenant at very low cost.
The CyberCARE offering, available exclusively from ited, provides a range of products to secure your emails, workstations, and servers, as well as prevention measures for your users.
We also recommend advanced email filtering tools.

4. Increase Cybersecurity Awareness Among Your Users

❗According to the 2025 cybersecurity report published by Hornet Security, phishing accounts for about one-third of email cyberattacks.

In most cases, it is human error that opens the door to cybercriminals: clicking on a phishing link, opening a malicious attachment, and unintentionally sharing sensitive data.

Best Practices:

💡Tip for SMBs
Always provide a short training course upon hiring, followed by refresher courses throughout your employees' careers to maintain safety and vigilance levels. 

5. Protect Your Sensitive Data with Data Loss Prevention (DLP) Software

DLP software acts as the guardian of your data. It is used to detect suspicious activity and enforce your organization’s security policies to reduce the risk of data leaks, theft, or loss, whether that data is stored in the cloud or locally.

Best Practices:

💡Concrete Example
Prevent the external sharing of a file containing credit card numbers or protected personal data.

Simplify Microsoft 365 Security with ited

Protect your data, your users, and your reputation. ited makes your M365 environment more secure, without complexity.

6. Configure Your Audit Logs and Monitoring

The traceability of your actions is essential for detecting incidents and proving your regulatory compliance (Law 25, GDPR, etc.).

Best Practices:

💡Tip for SMBs
Schedule a comprehensive security review with ited on a monthly or quarterly basis, depending on your needs, to detect anomalies before they become critical. 

7. Limit Access to Data and Apps

Control who accesses what in Microsoft 365.

Adopt the principle of least privilege. Each employee should have access only to the data and tools necessary for their job — nothing more. For an SMB, this advanced security measure significantly reduces the risk of data leaks or accidental changes to critical information.

Bonnes pratiques :

Créez des règles d’accès dynamiques en fonction de l’utilisateur, de l’emplacement ou l’appareil avec Conditional Access. 
Automatisez l’attribution et la suppression des droits avec des groupes de sécurité dynamiques. 
Limitez la portée du partage sur OneDrive et SharePoint en interdisant le mode « tout le monde qui dispose d’un lien ».

8. Backups and Continuity Plan

Many companies seem to believe that Microsoft automatically backs up all their data. In reality, Microsoft ensures the availability of the platform, but restoration in the event of deletion or encryption is your responsibility.

Best Practices:

Use a data backup solution such as CyberCARE, compatible with M365, to protect your data. 
Define a data retention policy that is tailored to your regulatory obligations. 
Test data restores regularly to ensure they are effective. 
Protect your backups with an encryption key.

9. Reinforce Your Microsoft 365 Security with ited

ited provides an advanced layer of protection against phishing attacks, malware, and dangerous attachments.

Key Features:

💡Tip for SMBS
Enable email filtering on all accounts, even on shared email accounts. 

10. Establish Clear Cloud Governance

Best Practices:

💡Tip for SMBs
Document your governance rules and train administrators to ensure consistent application. 

Strengthen Your Microsoft 365 Security Posture with ited

Microsoft 365 is a powerful platform, but its security is not automatic. It is up to each organization to  configure, monitor, raise awareness, and anticipate risks in order to reduce them.

By applying these best practices—from enabling MFA to setting up external backups—you significantly strengthen your Microsoft 365 security posture.

Cybersecurity is an ongoing process, not a fixed goal. With ited, you benefit from a partner who supports you every step of the way to ensure that your M365 environment remains secure, compliant, and efficient.

ited, the TSP expert

CLIENT PORTAL

CAREERS

SUPPORT HOURS: 7.30 A.M. - 6 P.M.

514-666-4833

Contact us today!

Microsoft 365 Security: Protect Your Data and Your Business

1. Enable Multi-Factor Authentication (MFA)

💡Did You Know?

Best Practices:

2. Secure Your Administrator Accounts

Best Practices:

💡Tip for SMBs

3. Set Up Basic Security Using the Right Tools

Best Practices:

4. Increase Cybersecurity Awareness Among Your Users

Best Practices:

💡Tip for SMBs

5. Protect Your Sensitive Data with Data Loss Prevention (DLP) Software

Best Practices:

💡Concrete Example

Simplify Microsoft 365 Security with ited

6. Configure Your Audit Logs and Monitoring

Best Practices:

💡Tip for SMBs

7. Limit Access to Data and Apps

Bonnes pratiques :

8. Backups and Continuity Plan

Best Practices:

9. Reinforce Your Microsoft 365 Security with ited

Key Features:

💡Tip for SMBS

10. Establish Clear Cloud Governance

Best Practices:

💡Tip for SMBs

Strengthen Your Microsoft 365 Security Posture with ited

Effectively secure your Microsoft 365 environment with ited

CLIENT PORTAL

CAREERS

SUPPORT HOURS: 7.30 A.M. - 6 P.M.

514-666-4833

Contact us today!

Microsoft 365 Security: Protect Your Data and Your Business

1. Enable Multi-Factor Authentication (MFA)

💡Did You Know?

Best Practices:

2. Secure Your Administrator Accounts

Best Practices:

💡Tip for SMBs

3. Set Up Basic Security Using the Right Tools

Best Practices:

4. Increase Cybersecurity Awareness Among Your Users

Best Practices:

💡Tip for SMBs

5. Protect Your Sensitive Data with Data Loss Prevention (DLP) Software

Best Practices:

💡Concrete Example

Simplify Microsoft 365 Security with ited

6. Configure Your Audit Logs and Monitoring

Best Practices:

💡Tip for SMBs

7. Limit Access to Data and Apps

Bonnes pratiques :

8. Backups and Continuity Plan

Best Practices:

9. Reinforce Your Microsoft 365 Security with ited

Key Features:

💡Tip for SMBS

10. Establish Clear Cloud Governance

Best Practices:

💡Tip for SMBs

Strengthen Your Microsoft 365 Security Posture with ited

Effectively secure your Microsoft 365 environment with ited

Microsoft 365 Security: Protect Your Data and Your Business

Simplify Microsoft 365 Security with ited

9. Reinforce Your Microsoft 365 Security with ited

Strengthen Your Microsoft 365 Security Posture with ited

Effectively secure your Microsoft 365 environment with ited