The limit allowed in a single archiving policy is restricted to 2 million root records.
Users who need to archive more than 2 million records are recommended to set multiple archive policies at complimentary time intervals, with the same SOQL.
When setting multiple policies with the same SOQL, or policies with the same date range, make sure to schedule them to run at different times to avoid collisions.
Sometimes you just want to talk to someone. Our customer support team is available by phone:Request a Technical Support Call Back