A global legal and insurance firm had moved 2,000+ users to Microsoft 365, but a decade of email still sat behind shortcuts to an end-of-life HP archive. It was retired in under six months without a single mailbox breaching its limits.
The firm's 2,000+ users were already on Microsoft 365, but for more than ten years they had reached older mail through shortcuts to an HP email archive. That archive was at end of life. Keeping it running was unsustainable, and switching it off would break every shortcut.
Simply rehydrating everything into mailboxes wasn't safe either. Some users had very large mailboxes and oversized messages, and pouring a decade of archive back in risked pushing them over Microsoft 365 quotas.
Rehydration isn't just about fetching originals. It's about deciding where each item should land so mailboxes stay within limits and stay usable. Test migrations, age-based tiering and automatic handling of Microsoft 365's archive expansion delays turn a risky bulk operation into a predictable one. The same approach applies to Enterprise Vault and other stub-based archives.
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