Tenant Mergers & Migrations
Secure. Seamless. Stress-Free.
When businesses acquire, consolidate, or restructure, Microsoft 365 tenants often need to be merged or migrated. But behind the scenes, that involves moving identities, mailboxes, OneDrive, Teams, SharePoint, and licensing — without disrupting users or losing critical data.
At Sighbr, we specialise in secure, well-planned tenant migrations. Whether you’re merging two Microsoft 365 environments or moving from one to another, we handle it all — with minimal downtime, zero data loss, and complete control over user experience.
Plan Your Tenant Migration with Confidence
Migrate Without the Mayhem
A tenant migration isn’t just about shifting data — it’s about preserving business continuity, maintaining compliance, and delivering a seamless user experience.
At Sighbr, we plan every step of the journey to make sure your people, processes, and platforms stay connected throughout.
✅ We start with a full pre-migration audit, identifying risks, dependencies, and licensing gaps across both tenants
✅ We design a clear migration plan, including coexistence setup for Teams, email, calendars, and file access, so users can keep working during the transition
✅ We handle everything: mailboxes, OneDrive, SharePoint, Teams, calendars, groups, Entra ID identities, permissions, policies, and more
✅ We align the new environment with your existing security and compliance standards, so nothing slips through the cracks
Whether you’re consolidating after an acquisition, spinning off a new entity, or cleaning up legacy tenants, we make the complex feel simple.
Security, Continuity, and User Experience First
Migrations can be noisy. They don’t have to be disruptive. Our process prioritises zero data loss, clear communication, and a frictionless end-user experience.
✅ We ensure all users retain the right access, permissions, and MFA settings post-migration
✅ All security policies — including DLP, retention, conditional access, and compliance configs — are reviewed and maintained
✅ We provide end-user onboarding support, so staff know what to expect and when
✅ After go-live, we perform a full post-migration validation, fixing any issues and fine-tuning performance
A successful tenant migration doesn’t just happen — it’s designed. With Sighbr, you’re not just moving tenants — you’re unlocking a stronger, more unified Microsoft 365 experience.
Don't Wing It.
How We Help
At Sighbr, we handle every part of the tenant migration process — from strategy to execution — with zero shortcuts and zero surprises.
Planning & Discovery
We audit both source and target environments, plan coexistence, and map every dependency.
Secure Data & Identity Migration
We handle everything — mail, files, calendars, Teams, SharePoint, Entra ID objects, and policies.
Zero Disruption Approach
We keep downtime to a minimum and provide support to keep users informed and confident.
Post-Migration Validation & Cleanup
Once migrated, we verify everything and optimise your environment for the future.