Microsoft 365 tenant-to-tenant mailbox migration with ShareGate

Productspotlight Mailboxmigration Featured

IT admins everywhere, rejoice! We’re excited to announce that ShareGate now supports tenant-to-tenant mailbox migrations.

It’s one of the most requested features from our users and the #1 migration workload for Microsoft 365 after SharePoint, and it’s finally here! This new functionality now makes ShareGate the complete migration package, set to allow our users to seamlessly migrate to Microsoft 365 with zero hiccups holding anyone back.

It also aligns with our larger philosophy of allowing our users to achieve ‘more with less’ and allowing IT teams to have a proactive approach towards Microsoft 365 management rather than a reactive one.

Mailbox migrations are now available in public preview, with the complete rollout expected to be generally available in the coming months. For now, with the public preview release, ShareGate supports tenant-to-tenant mailbox migration from Exchange Online to Exchange Online or Microsoft 365. 

This article explores what ShareGate’s mailbox migration functionality includes in the public preview. We also take a step back to see why this was so requested by our community and the challenges IT teams face in the absence of it. Let’s dive in!


What are the challenges of tenant-to-tenant mailbox migration?

People look for straightforward solutions for their migration needs. Ideally, migrations need to be rapid, smooth, and without any needless complexity acting as friction. Migration needs to just work without becoming its own thing. 

Still, common challenges arise, especially when mailbox migrations come into the picture. Some common challenges include: 

Challenge #1: Native Microsoft tools are complex

Here’s a common migration scenario: users use Microsoft native tools like the cross-tenant mailbox migration tool, and they realize they’re not particularly easy to use and often cause issues during migration, especially with large, complex migrations where limited features create migration issues.

The project stalls or fails, and then the IT team has to spend time trying to find a new solution. Add to this the fact that even Microsoft’s native migration solution for tenant-to-tenant migrations is a paid add-on, which just decreases the need to opt in for it versus a third-party solution.

Challenge #2: Staying on track with your timeline, budget, and business continuity

Migration projects happen fast and involve more than just moving mailboxes. Using different tools can make things take longer and add complexity. You want to aim for a smooth migration that stays on schedule, within budget, and keeps business rolling.

Most solutions on the market, including Microsoft native tools, are clunky and difficult to learn. This often leads to spending more time to ensure everything has been moved correctly rather than simply executing the migration.

Challenge #3: Licensing troubles

A common issue users face is the need to purchase a separate license as an additional add-on feature to migrate mailboxes. On top of that, the licensing models are quite complex and require some time to understand a suitable pricing model based on the amount of data that needs to be moved. And making mistakes might require more licenses, leading to budget overruns.

This escalates both cost and migration complexity. The more tools you use, the more problems and delays you’ll face, leading to higher migration costs.


The solution: ShareGate now supports tenant-to-tenant mailbox migrations!

That’s right! We sweep away your migration challenges. With the newly added tenant-to-tenant mailbox migration functionality, you can copy mailboxes right out of the box (just check out this GIF 🤯)!

Master Mailbox Copy Gif

Benefits of using ShareGate for mailbox tenant-to-tenant migration

Our users can now breeze through mailbox migrations between tenants—no snags, just pure relief! We’ve taken our community’s feedback into consideration to solve the major pain points they face when trying to migrate mailboxes.

We’ve also designed this feature with the goal of keeping things simple for your IT team so the entire process remains smooth and free of needless complexity to save you any headaches. Here are the benefits you can now enjoy:

Easy to use

  • An intuitive UI that lightens the load on big migration projects with mailbox migrations that just work. 
  • Simple copy selections for all mailboxes or custom groupings so you can customize your migrations as you see fit
  • Migrate messages, attachments, and folders intact to your destination. 
  • Migrating messages includes essential attributes for labeling, such as flags and importance.

Monitor and control

Powerful governance and control features to keep IT teams in cruise control with a proactive approach rather than reacting to unwanted outcomes. Here’s what’s included: 

  • A post-migration report that delivers the results of your migration for analysis and adjustments.  
  • Easy planning for a sequenced migration with date-frames that enable you to bring over only what you need with filters that will copy 3 or 6 months of messages or set your custom timeframe.  
  • Mailbox mapping that’s automated or adjustable so you can customize as you see fit.
Mailbox Migration Mailbox Mapping
  • View a summary of your configured migration before you make the move, including an alert for unmapped mailboxes.
Mailbox Migration 5 Copy Review

Easy to deploy

Get moving in minutes with software you can simply unbox and go. It’s so simple that you can distribute the work anywhere within your IT team. No scripts or coding is needed. 

Simplicity isn’t just convenient; it’s vital for business continuity. It means quickly adapting and letting your IT team concentrate on the core tasks.

Mailbox Migration Recipient Mapping

Easy to choose

We’ve made it easy for you to choose ShareGate for mailbox migrations by removing the usual friction you experience with the current solutions on the market. Now, confidently consolidate your tools with all your tenant-to-tenant migration workloads in one package at a fixed price.  

Expand your IT toolbox without adding more tools. SharePoint, Teams, Planner, OneDrive, file shares, and more migration workloads—now with tenant-to-tenant mailbox migrations, too!

How to do tenant-to-tenant mailbox migration

Copy your users’ Microsoft 365 mailboxes as part of your migration projects with ShareGate’s Copy mailboxes feature.

  1. Select Copy from the sidebar.
  2. Select the Copy mailboxes tab.
  3. Click Copy mailboxes.
How To Mailbox Migration

See our technical documentation for full instructions on how to copy mailboxes in ShareGate.


Why it matters

Hassle-free mailbox migrations matter for:

  • Smooth business continuity without costly delays standing in the way. 
  • Accelerated migration projects that actually help cut down on time and resources. 
  • Controlling costs, especially in the context of outsourcing and licensing.  
  • Minimizing needless complexity and making migration a process that doesn’t cause headaches 

Get your tenant-to-tenant mailbox migration project off on the right foot, right out of the box, with a single tool that takes the complexity out of moving to Microsoft 365 and brings your content safely and quickly to your destination. 

Try ShareGate for free and experience firsthand how easy migrations can be!

TIP: Whether you’re going through a merger, an acquisition, or a reorganization, this playbook will give you the insights you need to plan and execute your tenant-to-tenant Microsoft 365 migration efficiently.


Stay tuned!

We’ll let you know when ShareGate’s mailbox migration is ready for general availability. Join our waitlist to be among the first to have access when it launches and receive exclusive updates, including resources and when we add more features. 

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