Best combination of password Policies to enhance M365 security

I – Introduction :

Password security is a crucial element in protecting your organization’s sensitive information and resources. In Microsoft 365 (M365), it’s essential to implement robust policies to ensure that user passwords are both secure and easy to manage. This article explores three key policies for strengthening password protection in M365 :

1. configuring passwords to never expire
2. setting up a banned password list.
3. using self-service password reset (SSPR) methods with two authentication methods.

By combining these strategies, you can create a secure environment that minimizes the risk of password compromise while enhancing the user experience.

II – Set passwords to never expire :

Current research shows that mandatory password changes can do more harm than good. Microsoft recommends not imposing periodic password changes and focusing instead on long, unique passwords.

When users are forced to change their passwords frequently, they tend to choose weaker passwords or reuse old passwords with slight modifications, which can be easily guessed by attackers.

To set Psaaword to never expire :

1. Go to office 365 admin center : https://admin.microsoft.com/
2. Select “Settings” from the left menu bar
3. Select “Org Settings“
4. Select “Security & Privacy“
5. Select “Password Expiration Policy“

• Select “Set password to never expire (recommanded)“
• Click “Save“

III – setting up a banned password list :

Adding a list of banned passwords in Microsoft 365 is crucial for several reasons :

• Preventing weak passwords : Users tend to choose simple, everyday passwords, such as “Password123” or “Qwerty123”. A list of banned passwords prevents the use of these easily guessed passwords, reinforcing overall security.
• Protection against dictionary attacks : Attackers often use lists of common passwords to try to guess users’ passwords. By banning these passwords, you significantly reduce the risk of successful attacks.
• Compliance with best practice : The use of a banned password list is recommended by security experts and regulatory bodies to ensure that the passwords used are sufficiently complex and secure.
• Customization for specific needs : You can add terms specific to your organization, such as product names or internal abbreviations, to the list of banned passwords. This prevents users from using passwords that could easily be guessed by someone familiar with your organization.

In short, a banned password list is an essential tool for strengthening password security in Microsoft 365, preventing the use of weak passwords and protecting against common attacks.

To add bunned password list :

1. Go to office 365 admin center : https://entra.microsoft.com/
2. Select “Protection” from the left menu bar
3. Select “Authentication methods“
4. Select “Password Protection“
5. add the list of banned passwords then select “Enforced” to apply the policy.
6. Select “Save“

IV – using self-service password reset (SSPR) methods with two authentication methods :

Using self-service password reset (SSPR) methods with two authentication methods in Microsoft 365 is crucial for several reasons :

• Enhanced security : By requiring two authentication methods, you add an extra layer of security. Even if an attacker manages to obtain a user’s password, it will be difficult for them to access the second authentication method, such as a code sent by SMS or an authentication application.
• Fewer calls to IT support : Users can reset their passwords themselves, without having to contact IT support. This reduces the support workload and enables users to quickly regain access to their accounts.
• Improved user experience : Users appreciate the convenience of being able to reset their passwords anytime, anywhere, without waiting for IT support to intervene.
• Compliance with security policies : Many security regulations and standards require the use of multiple authentication methods for password resets. By using SSPR with two authentication methods, you ensure compliance with these requirements.
• Reduced risk of compromise : By combining multiple authentication methods, you reduce the risk of weak or compromised passwords being used to access user accounts.

Common Authentication Methods for SSPR

• Email
• Phone (SMS/Call)
• Microsoft Authenticator App
• Security Questions
• Hardware Token (FIDO2 keys)

To setup SSPR methods :

1. Go to office 365 admin center : https://entra.microsoft.com/
2. Select “Protection” from the left menu bar
3. Select “Password Reset“
4. Select “Authentication methods“
5. Select two authentications method (as your company needs).
6. Select “Save“

V – Conclusion :

By adopting a combined approach to password protection in M365, you can significantly enhance your organization’s security. Setting up a list of banned passwords prevents the use of common, easily guessed passwords, while configuring passwords to never expire reduces risky behavior associated with frequent password changes. Finally, implementing self-service password resets with two authentication methods offers a convenient and secure solution for users.

By integrating these policies, you create a solid defense against potential threats and ensure effective password management within your organization.

Thanks