Mergers, acquisitions, divestitures, rebrands. Sooner or later, an email tenant has to move. The big migration vendors quote six figures and timelines measured in quarters. The DIY path is a skeleton crew working overnight, hoping nothing drops.
Tenant Migration is the middle path. A real expert team that has actually run cutovers without losing messages, with Backup MX absorbing the propagation window so mail doesn't bounce while DNS settles.
Tenant Migration began the way most DuoCircle products do. A customer asked. They had an M365 tenant cutover coming up, the brand-name migration vendors were quoting numbers that did not pencil out for their organization, and the alternative was an overnight DIY weekend with no safety net. They asked if we would help.
We said yes. We did the cutover. We used Backup MX as the buffer so no inbound message bounced while the MX record propagated. We documented the runbook. The next customer asked for the same thing, and the one after that, and the product wrote itself.
Tenant Migration sits inside the broader Route portfolio alongside Backup MX and Email Forwarding. The same routing engine powers all three. When a cutover requires forwarding to bridge the legacy address space to the new tenant, that path is already there.
Mailbox content migration, MX cutover with Backup MX absorbing the propagation window, domain and alias preservation, pre-flight planning before anyone touches DNS, and one team accountable end to end.
Mail, contacts, calendar items, and folder structures move from source tenant to target. Microsoft 365 to Microsoft 365, Google Workspace to Microsoft 365, or the reverse direction. Permission and folder hierarchies preserved so the new tenant feels like the old one on day one.
DNS propagation does not happen instantly. While the MX record cuts over, our Backup MX queues every inbound message and replays it to the new tenant once the cutover lands. No bounces, no lost messages, no overnight panic when a customer claims they sent an order on Saturday.
Every route that worked at the source keeps working at the target. Aliases, distribution lists, shared mailboxes, catch-all rules. The migration team verifies the routing map before cutover, so nothing important resolves to a black hole on Monday morning.
Before anyone touches DNS we review the source tenant, the target tenant, and the cutover plan. Authentication records, MX hierarchy, third-party senders, the things that quietly break when you forget them. The plan is written down before the weekend, not improvised during it.
If you also run Outbound SMTP, Phishing Protection, or DMARC Report with us, the migration team coordinates with the rest of your stack natively. The people running the cutover are the same people who run the products that depend on it. Cutover-week escalation goes to one inbox.
Built for the organizations that fall between the six-figure enterprise migration quote and the skeleton-crew DIY cutover. Mid-market and SMB tenants moving for a merger, a divestiture, a rebrand, or a path off legacy infrastructure. Real engineering at a tier that fits the budget.
Two of the three configurations forward at least some mail the moment the cutover lands. Here is what those address maps actually look like.
Every address mapped explicitly. No queue.
Forward anywhere, no validation required. Up to five aliases per address. Mail flows the moment the cutover lands; nothing waits in a queue. Best when you can pre-map every address before cutover weekend.
Forward criticals, queue the rest.
Pick the addresses that have to keep flowing in real time (executives, support, billing) and forward them explicitly. Everything else lands in the queue and replays once the cutover is complete. You get zero downtime where it matters without writing a per-user mapping for every employee.
Tenant Migration is $647 (Queue) or $747 (Email Forwarding / Hybrid), one-time fee per domain. Unlimited mailboxes during cutover, 45-day queue retention, no per-user pricing.
Three configurations covering the cutover patterns we see in production. Risk-free for 14 days; credit card required at checkout.
Zero downtime migration
Risk-free for 14 days · Credit card required
Default. Zero-config email queuing.
Risk-free for 14 days · Credit card required
Forward criticals, queue the rest
Risk-free for 14 days · Credit card required
After checkout, contact support to configure your hybrid mapping.
SOC 2 Type II
45-day retention
Message Replay
24/7 expert support
Every plan is risk-free for 14 days. Place an order with a credit card, walk away within 14 days for a full refund, or keep the configuration that works.
Prices snapshot from the DuoCircle portal catalog. Refreshed manually as the price list changes.
Three configurations, one-time fee per domain: Tenant Migration Queue $647, Email Forwarding $747, Hybrid Approach $747. Unlimited mailboxes during cutover, 45-day queue retention, no per-user pricing.
Per domain, one-time. The fee covers unlimited mailboxes during the cutover window. No per-mailbox charges, no overage if you have more users than expected.
Queue holds all inbound mail in a 45-day buffer and replays it once the cutover lands — zero pre-configuration, default for most cutovers. Email Forwarding maps every address explicitly to a new destination — zero downtime, requires you to pre-map. Hybrid forwards critical addresses (CEO, support) immediately while queueing the rest — zero downtime for important mail without the per-user mapping work.
Microsoft 365 to Microsoft 365, Google Workspace to Microsoft 365, or the reverse. Backup MX absorbs DNS propagation so no inbound mail bounces during the cutover.
Yes, risk-free for 14 days. Place an order with a credit card and walk away within 14 days for a full refund, or keep the configuration that works.
The published price covers one domain per order. For multi-domain cutovers or consolidations, contact sales for a quote.
If you can use the online checkout, the price you see is the price you pay.
You need a full collaboration suite cutover. Calendars, drives, Teams or Spaces channels, SharePoint, deep collaboration history. Tenant Migration handles the mail-side cutover cleanly, but the full collaboration cutover is a specialist function and we will tell you so during the pre-flight call.
You need full change-management consulting wrapped around the cutover. Project management offices, formal training rollouts, executive change-comms. The big enterprise migration vendors bundle that. We do the engineering side cleanly; the change-management wrap is not what we sell.
Your cutover is a single mailbox or a handful of users on a personal domain. The pre-flight planning, runbook, and Backup MX safety net are sized for organizational cutovers. For a one-off mailbox move, the platform-native import tools may be all you need.
When you contact us about a tenant migration, the person on the call is the kind of expert who has actually run cutovers without losing mail. We tell you the timeline, the risks, the safety net, what we will and will not do, and whether your situation is a fit before any contract gets drafted.
Reference calls with existing Tenant Migration customers are available on request. Most enterprise customers will not allow public logo use, but they will take a phone call from a serious prospect to vouch for what we actually deliver in production.
Same-day response. Real expert on the call. We tell you the timeline, the risks, and how Backup MX keeps inbound mail intact during propagation.