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228 Case Studies
Case Study: McCann FitzGerald achieves secure, zero‑downtime migration of 47 TB of email archives to Exchange Online with Quest
A Quest Case Study
Law firm advances its cloud-first strategy by moving 47 TB of vital email archives to Microsoft 365
McCann FitzGerald LLP, a leading Irish law firm with about 600 employees, needed to complete a cloud-first move of its email to Microsoft 365 while meeting strict compliance requirements. The biggest challenge was migrating 47 TB of business‑critical Enterprise Vault archives to Exchange Online without downtime, data loss, or overwhelming the internal IT team.
The firm engaged HPE and chose Quest Archive Shuttle with Quest Managed Services to perform the migration; archiving was paused during the cutover and mailboxes were transitioned to Exchange Online. The migration completed smoothly with all 47 TB moved securely, no downtime or data loss, and minimal burden on in‑house staff—saving months of work, simplifying audits, and removing costly on‑prem infrastructure.
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McCann FitzGerald
Lorne Gallagher
IT Infrastructure & Operations Manager