How do you handle mailbox migrations larger than 100 GB?

[Client Arjun Mehta]

Handling mailbox migrations larger than 100 GB requires a structured, incremental, and throttling-aware approach to avoid downtime and data loss. First, assess the source environment and archive or split older data where possible. Use incremental migration to transfer data in batches, syncing only changed items after the initial pass. Enable filters such as date range, folder selection, and attachment exclusions to reduce payload size per job. Utilize PST splitting or mailbox partitioning when exporting to local formats. Schedule migrations during off-peak hours and apply bandwidth throttling to prevent server overload. Ensure proper indexing and deduplication to avoid redundant transfers. Monitor progress through logs and dashboards, and rerun delta syncs until full consistency is achieved. Enterprise tools like Aryson Office 365 migration solutions can further automate mapping, retries, and compliance handling for large-scale mailbox moves efficiently and securely at scale smoothly completed