Microsoft offering a new unified communication and collaboration app i.e. Microsoft Teams. Which is rapidly growing and gaining popularity because, Microsoft offers Office 365 suite with complete productive package – integrating tools like; SharePoint, Word and Excel within a messaging and calling feature.
Microsoft Teams offer an efficient way to deliver an integrated communication, collaboration and productive system.
Compliance and Certification
Microsoft Teams covering essential model and standards such as; SOC 1, SOC 2, ISO 27001, and HIPAA.
As for SOC 2, Microsoft stated – 
However, Microsoft Teams designed to handle data in compliance such as HIPAA, this shows data security is a priority.
Authentication
Microsoft making it much harder for external and unauthorized user to gain access by including various authentication protocols like; organization-wide 2FA or single-sign on through AD.
Encryption
Both Microsoft Teams and Slack encrypt user data in-transit and at-rest. The difference is lies in the process how they handle and control.
Slack handles their encryption process themselves. On the other-hand, Microsoft uses AD to manage these encryption function that means giving IT admins or IT department more control over their data security. Additionally, Office 365 apps like; SharePoint and OneNote offering their own protocol to add another layer to data protection.
Auditing and Reporting
Auditing and reporting is one of the crucial step when we talk about security and Microsoft Teams support audit log searches within Office 365 Security and Compliance Center, an important feature through which administrator quickly identify potential incidents. Apart from this administrator can also set alerts for specific events or activity to increase incident investigation.
Helpful Resources:
How to Configure SharePoint Online Auditing
How to View SharePoint Online Audit Log Reports
Access Permissions
Microsoft Teams offers customized access permission feature to make your deployment as secure as you need it to be.
By default, Teams offer two security levels to users i.e.: Owners and Members.
That means any user how creates a new group is the Owner (Owner has all the granular controls as needed) and he/she has all the rights of control settings he/she can sets restrictions on every thing from viewing content to adding member/connections.
Data Location
Generally, Microsoft teams physical location of your data will be established on your region that’s important and also helps if you live in an country which has more stricter data security regulations than other region.
Currently, Microsoft Teams Support regional data allocation by using Azure for users those located in the North America, South America, United Kingdom, Europe Middle East and Africa (EMEA), and APAC.
Microsoft Teams about Cloud Data
For organizations data security is always a concern. Check here about Top Cloud Security Threats. But, with Microsoft teams you have right security tools and protocols for your data security, so ou don’t have to worried about your sensitive data operating in the cloud.