Create an Office 365 plan for Teams. The Office 365 plan specifies which teams are backed up, how long the data is retained, and which teams are content indexed.
You will assign the Office 365 plan to the teams that you add to the Teams app.
If some teams have different backup requirements, you can create additional Office 365 plans for Teams.
From the navigation pane, go to Manage > Plans.
The Plans page appears.
In the upper-right area of the page, click Create plan, and then select Office 365.
The Create Office 365 plan dialog box appears.
In the Plan name box, enter a name for the plan.
Under Retention settings, specify how long to retain the data:
To retain for an unlimited time, select Retain indefinitely.
To retain for a limited time, select Retain deleted items for, and then specify the amount of time.
Search settings for Office 365 plans apply only to Exchange.