How can I handle API rate limits during bulk migration?

During bulk migration, API rate limits can be managed by controlling request frequency and concurrency instead of sending large bursts of requests. Use request throttling, batching where appropriate, and monitor API responses for 429 Too Many Requests errors. When a 429 response occurs, follow the Retry-After value provided by the API before retrying; if it is unavailable, use exponential backoff with jitter. Microsoft Graph specifically recommends reducing request frequency, avoiding immediate retries, and retrying throttled requests according to the recommended delay. For large Microsoft 365 migrations, it is also useful to track failed requests, control concurrent operations, and resume failed tasks rather than restarting the entire migration. A dedicated migration solution can simplify these tasks by automating throttling, retries, and request pacing, helping administrators handle Cloud API Rate Limits more efficiently during bulk mailbox, OneDrive, and SharePoint migrations.