mailbox quota

Exchange Online mailbox quotas are straightforward in concept but layered in practice — and the difference between a 30 GB limit and a 1.5 TB “auto‑expanding” archive can be the difference between a smooth migration and a frustrated user locked out of email. m]) Background / Overview Exchange...

Microsoft is introducing an automatic, threshold-driven archiving feature for Exchange Online — Auto-Archiving — that will begin rolling out to public clouds on October 15, 2025 and to government clouds the following month; when enabled for a mailbox that already has an archive provisioned, the...