Free trial restrictions

The following restrictions apply to free trial accounts:

A maximum of 25 users and 25 site collections for Microsoft OneDrive for Business
A maximum of 25 users for Microsoft Office Exchange Online and Microsoft Office 365 groups
A maximum of 3 immediate backups per day.
Automated backups for only the first 30 days.
No scheduled backups are allowed during the 15 day grace period after the free trial ends.