Is Microsoft Teams secure for confidential information? Yes, Microsoft Teams can be used to handle confidential information. 

Teams is part of the Office 365 suite, and Microsoft states that this service comes with robust security measures, i.e. encryption, identity protection, data loss prevention (DLP), retention policies, and other security features. This means there is no security issue with Microsoft Teams for keeping or exchanging confidential information. 

However, Teams will not automatically safeguard your information from unauthorized access. For this, you have to set permissions, guest access, authentication, and security policies; only you can ensure your data safety in Microsoft Teams.

In this guide, I’ll let you know how to set these settings and preventive measures to keep data safe. Let’s begin our discussion from the basics, so you will understand the query from A to Z. 

Is Microsoft Teams Safe for Confidential Information?

Yes. Microsoft Teams comes with an enterprise-level of security that ensures robust security of team chat, channels, posts, files and other data. However, the security measures depend on your Microsoft/Office 365 plan. Enterprise plans, i.e. E1, E3, E5, offer different levels of higher-level security for the user’s data.

Teams uses Microsoft 365 security infrastructure and offers security measures such as:

  • Encryption of data
  • Microsoft Entra ID authentication
  • Multi-factor authentication (MFA)
  • Single sign-on (SSO)
  • Data loss prevention (DLP)
  • Sensitivity labels
  • Retention policies
  • eDiscovery
  • Audit logs
  • Compliance policies
  • Guest and external access controls
  • Meeting security controls

Microsoft states that Teams uses TLS to encrypt network communications and SRTP to protect real-time media traffic. Teams data is also encrypted at rest within Microsoft services.

Therefore, Teams can support confidential business information. However, the security of the information also depends on how the organization’s Microsoft 365 environment is managed.

How Does Microsoft Teams Protect Confidential Information?

Teams uses multiple security layers rather than a single security feature. Let me explain all of them one by one:

#1. Encryption

Microsoft Teams encrypts data while it is transferred between users and clients. This helps protect information such as:

  • Chat messages
  • Shared files
  • Meeting content
  • Audio and video
  • Screen-sharing traffic
  • Other Teams-related data

Encryption makes it much harder for unauthorized users to read the information. 

However, encryption does not prevent an authorized user from intentionally or accidentally sharing confidential information with someone else. This is why monitoring the Microsoft Teams activity is equally important. 

#2. Microsoft Entra ID

Microsoft Teams uses Microsoft Entra ID for identity and access management. 

So, you can use Microsoft Entra ID to control who can access Microsoft 365 resources and apply authentication and security policies. Teams also supports MFA and other identity controls.

To add a security layer, you can add MFA (Multi-factor Authentication), which reduces the risk of account hacking or data loss.

#3. Data Loss Prevention

Data Loss Prevention (DLP) is necessary when you regularly exchange confidential data with clients. It prevents sharing confidential information with unauthorized people. 

It checks messages and shared content for sensitive information based on the rules set by the organization.

DLP policies warn users from sharing sensitive information when a security rule is triggered. This helps keep business data safe and protected from leaks. 

#4. Sensitivity Labels

Sensitivity Labels help you mark information based on how sensitive it is. Labels can be of different types, i.e. Public, Internal, Confidential, or Highly Confidential.

These labels help control who can access or share sensitive information. They make it easier for users to understand how they should handle the information. For any sensitive information, you can apply the “Confidential” label to it. 

#5. Teams Meeting Security

Microsoft Teams provides several settings to keep meetings secure, which is equally important as securing chats. You can control who can: 

  • Join the meeting
  • Present
  • Access the meeting

These settings help prevent unwanted people from joining meetings, which is necessary to safeguard sensitive information. 

For meetings that contain critical information, you can also use features such as:

  • Meeting lobby
  • Restricted participant access
  • End-to-end encryption

#6. End-to-End Encryption for Certain Meetings

End-to-End Encryption (E2EE) adds an extra layer of security by encrypting the meeting content so that it can only be accessed by the assigned users in the meeting.

This feature is useful for meetings that discuss highly confidential information. However, E2EE is available only for supported meeting types and does not protect every Teams feature. Therefore, you should check the meeting settings before using it.

#7. Guest Access

Guest access should be managed carefully when you are dealing with confidential information. Organizations can control guest access and decide which Teams, channels, and files external users can access.

By limiting guest access to only the people who need it, you can reduce the risk of data leaks.

What Are the Risks of Storing Confidential Information in Teams?

Although Teams provides strong security features, it’s not risk-free. The biggest risks come from:

  • Misconfiguration
  • User behaviour
  • Compromised accounts

Because of these, here’re the risks which are generally occur:

  1. Accidentally sharing confidential information with the wrong person or an unauthorized user. 
  2. Giving access to too many external users can increase the chances of an information leak.
  3. If a user’s account is hacked, the attacker gains access to Teams chats, files, and other Microsoft 365 data available to that account.
  4. Files shared in Teams can be stored in connected Microsoft 365 services such as SharePoint or OneDrive. This means you have to configure the high-level security settings with those services also. 
  5. Chats with external users can have different security controls, so organizations should be careful when sharing confidential information outside their organization.

What Information Should You Avoid Sharing in Microsoft Teams?

It is recommended to avoid sharing the following items to be shared with anyone:

  • Passwords
  • Authentication codes
  • Encryption keys
  • Private security credentials
  • Highly sensitive customer information
  • Sensitive financial information
  • Confidential legal documents
  • Trade secrets
  • Unreleased business strategies
  • Highly sensitive employee information

It is not necessary that you can’t share these items, but be careful when sharing with external users or clients. 

Best Practices for Using Microsoft Teams for Confidential Information

If your organisation uses Microsoft Teams daily for exchanging information or professional chatting, then follow this checklist: 

#1. Enable MFA for extra security. To enable this, you only need a phone number or an email ID. 

#2. Use conditional access, and you can apply policies based on:

  • User identity
  • Device compliance
  • Location
  • Application
  • Risk level

#3. Apply Least-Privilege access. In simple terms, users should have only the access they actually need.

#4. Do not allow unrestricted guest access to confidential Teams. You can limit guest users also by going to the Microsoft Teams user settings.  

#5. Create Microsoft Purview DLP policies for sensitive information. It is required because sometimes users share sensitive information with unauthorized users, and DLP shows a warning or can even stop the sharing. 

#6. Use labels for sensitive information before sharing any content, especially sensitive. You can utilize:

  • Public
  • Internal
  • Confidential
  • Highly Confidential

#7. Maintain a proper Microsoft Teams chat backup locally to ensure accessibility even if it is lost from your Teams account. 

Backup Microsoft Teams Data for Additional Protection

Microsoft Teams has many security features, but to make a robust security net, it’s important to keep a separate backup of your data. If important Teams chats are deleted accidentally or become unavailable, a local backup can help you access and restore them.

For this, there is no direct manual solution available, as Microsoft Teams data is stored in multiple locations, and backing up one chat at a time becomes a hectic task for a large data set. 

That’s why I tried and suggest you opt for the SysTools Microsoft Teams Backup Tool. It helps you back up Teams chats locally in one go. You can try this utility on a Windows 10/11 (64-bit) system. 

Download Now Purchase Now

It backs up all the Microsoft Teams data in JSON file format, which is easily accessible from your local computer whenever required. For further queries, you can use their live chat assistant 24/7.

Is Microsoft Teams 100% Secure?

No collaboration platform can guarantee 100% security.

Microsoft itself notes that it is impossible to tackle every unknown security threat. We discussed Microsoft Teams security measures, which you have to manage properly. Otherwise, you will face data breaches and loss scenarios. 

Author’s Verdict

Is Microsoft Teams secure for confidential information? Yes, Microsoft Teams is secure enough to be used for confidential business information when it is properly managed. It is recommended to have a backup copy to ensure data accessibility if the account is compromised or data is hacked. 

I hope you enjoyed the discussion and got all the valuable insights related to this query.