Advanced eDiscovery allows you to analyze unstructured data within Office 365, perform document review of stored data located in Exchange Online, SharePoint Online, OneDrive for Business, Skype for Business, Office 365 Groups, and Microsoft Teams. Searches can be performed in the new Microsoft 365 Security and Compliance center.

Important Note: Advanced eDiscovery requires an Office 365 E3 with the Advanced Compliance add-on or an E5 subscription for your organization. If you don't have that plan 

Office 365 Enterprise Plan E3 & E5 

The following topics describe the setup and use of Advanced eDiscovery modules and features:

Once you have decided on the best plans for your organization it's time to Enabling New Office 365 Services.