Microsoft product
Moving one Office 365 tenant into another while keeping the domain means planned downtime. Here is the BitTitan sequence that holds it to 30 minutes, with every PowerShell script.
GoDaddy's Office 365 uses the same MX records as regular Office 365, so the domain itself becomes the blocker. Here is the remove-and-recreate runbook that keeps downtime to 5 to 15 minutes.
Migrating off BAE Silversky hosted Exchange is fast, but the whole job stalls until impersonation rights are set. Here is how to get them through Silversky support and run the BitTitan cutover.
Email migrations run for weeks. These are the source and destination PowerShell scripts we keep in our runbook: bulk user import, UPN swaps, throttling, impersonation, and more.
Migrating on-prem Exchange to Office 365 is gated by upload speed, not by BitTitan or SkyKick. Audit bandwidth, tune concurrency, and prestage weeks ahead so MX cutover is the easy part.
