Microsoft Tenant-to-Tenant Migration Services

Whether you’re merging companies, divesting a business unit, or restructuring your Microsoft 365 environment, cross-tenant migration is a critical step — and one that must be handled with precision. We specialise in secure, seamless Microsoft 365 tenant-to-tenant migrations that preserve your data, minimise disruption, and keep your business running smoothly throughout the transition.

Talk to us today

Expert-Led Tenant-to-Tenant Migrations with Zero Disruption

A Tenant-to-Tenant Migration is the process of transferring everything from one Microsoft 365 tenant (your organisation’s dedicated cloud environment) to another. This includes emails, files, Teams chats, SharePoint sites, and user accounts.

Our team of migration experts help you navigate the entire tenant-to-tenant migration process with confidence. From initial assessment and planning to the final switchover, we manage every detail to ensure a smooth transition. Using advanced migration tools and a wealth of hands-on experience, we safeguard your data, minimise downtime, and keep your business running seamlessly throughout the move.

Let’s chat about your migration

When is a Tenant-to-Tenant Migration required?

Whether it’s out of necessity or to improve performance and reduce costs, businesses often turn to tenant-to-tenant migration to stay agile and efficient. Here are some of the most common reasons businesses come to us for help:

Mergers & acquisitions

Consolidate Microsoft 365 tenants quickly and securely when two or more businesses come together.

Business Divestitures

Separate users, data, and services cleanly during the sale or spin-off of a business units.

Cost Savings

Migrate to a new tenant to take advantage of cost savings and more favourable pricing plans.

Brand restructuring

Reorganise your Microsoft 365 environment to reflect a change in brand, naming, or legal structure.

Internal Reorganisations

Align departments or subsidiaries under a centralised or decentralised tenant structure.

Geo Consolidation

Merge regional tenants into a single global environment to streamline management and compliance.

What gets moved in a Microsoft 365 Tenant migration?

Here’s a quick look at what usually gets moved over during a Microsoft 365 tenant-to-tenant migration.

Mailboxes & Email Data

We migrate all your email content, including messages, calendars, contacts, and tasks. Any archived mail stored in In-Place Archives is also transferred. Where possible, we preserve your existing mailbox rules so your email functions just as it did before the migration.

OneDrive Files & Folders

All files, folders, and version histories from OneDrive for Business are securely moved to your new tenant. We maintain file permissions wherever possible and help you re-establish any external sharing links to keep collaboration seamless.

SharePoint Data

From site collections to document libraries, we transfer all SharePoint content, including pages, lists, and metadata. Permissions and group memberships are migrated, and we ensure any custom settings are properly restored in the new tenant.

Microsoft Teams Environment

We move your Teams structures, members, channels, and stored files so collaboration can continue without interruption. Standard channels are handled with ease, and we have proven methods for migrating private channels, chat history, and reconfiguring apps, tabs, and connectors.

Other Microsoft 365 Services

We also assist in transferring Planner boards, Power Automate flows, Power BI workspaces, Forms, Yammer communities, Bookings data, and Stream videos. Where automated migration isn’t possible, we guide you through export and recreation to keep everything in sync.

User Accounts and Security Settings

We recreate your Azure Active Directory accounts in the new tenant, assign licences, and configure your security settings — including multi-factor authentication, conditional access policies, and group memberships — so your team can log in and get working straight away.

We’re a leading Microsoft Solutions Partner

To ensure a smooth and successful Microsoft 365 migration, it’s essential to work with a trusted partner who understands the full scope of the Microsoft ecosystem.

Cobweb is among the top 0.3% of Microsoft partners in the UK—out of over 30,000—to hold all six Microsoft Solutions Partner designations. This achievement reflects our certified expertise across Microsoft 365 and Azure, enabling us to deliver strategic migration planning, secure execution, and long-term value for your organisation.

Talk to us about your migration

Our steps to a successful migration

Our migration process is designed to ensure a seamless, secure, and supported transition from start to finish—here’s a top-level overview of how we deliver it:

Pre-Migration Prep

We lay the foundation for a smooth migration by preparing your systems and aligning everything for success.

Assess & Inventory – we review your current setup and catalogue the data to be migrated.
Configure & Align – we prepare your new environment, ensure system compatibility, and align domain settings.
Document & Communicate – we provide a clear migration plan and brief key stakeholders to ensure alignment and transparency.

Migration Execution

We carry out the migration securely and efficiently, keeping your team informed and supported.

Transfer & Set Up – we securely migrate your data and update user accounts and permissions.
Reconfigure Systems – we adjust applications and integrations to work seamlessly in the new environment.
Support & Finalise – we assist with user communications, provide training, and confirm successful migration.

Post-Migration Support

We ensure everything continues to run smoothly and provide support where needed.

Validating & testing – we check data integrity and system performance post-migration.
Legacy cleanup – we assist with decommissioning or archiving your old systems if required.
Ongoing support – we’re here to troubleshoot and assist as your team settles into the new environment.

FAQs

We’ve listed some of our most frequently asked questions, but if you can’t find the answer you’re looking for, get in touch with our team.

The duration depends on the size and complexity of your data, the number of users, and any custom configurations. Migration projects can range anywhere from a few days, to several weeks.

The cost of migrating to Microsoft 365 varies depending on factors such as the number of users, data volume, complexity, and additional services like support or training. Get in touch to tell us about your requirements and we can provide you with indicative costs for your migration

Our migration process is designed to minimise downtime. We work closely with your team to schedule the migration and ensure continuity of operations throughout the process.

Security is a top priority during migration. We use encrypted data transfer, follow Microsoft best practices, and ensure compliance with industry standards to protect your information.

Get in touch to schedule an initial consultation. Our experts will assess your requirements, design a tailored migration plan, and guide you through every step of the process.

Talk to us about your migration project

Let us help you merge tenants with ease. Fill in your details and we’ll be in touch with you shortly!