Microsoft Bumps Auto-Expanding Archive Limit Past 1.5 TB
First revealed in 2015, the history of auto-expanding archives in Exchange Online has been spotty with several false starts. Now the limit will go past 1.5 TB, but only for eligible E5 licenses. Although the roadmap item has roll-out scheduled for October 2026, Microsoft hasn’t revealed details of what the new upper limit will be or how the new limit will be managed. Having a massive archive mailbox will never concern me, but there must be some who need such a monster archive.