0365 Migration Process
Office 365 (O365) Tenant Migration
It means moving all of your Microsoft 365 data, including email, contacts, documents and settings, from one tenant to another with minimal disruption to your daily operations.
At SA1 Solutions, we manage Office 365 migrations from start to finish, keeping your data secure and accessible throughout the move. Our team builds the migration plan around your business, so the transition stays efficient, low-risk and cost-effective.
Our Office 365 Tenant Migration Process
Moving to a new Microsoft 365 tenant touches every part of your business, so we run each migration as a structured, phased project. From the first assessment through to post-migration support, we move your email, files, SharePoint and Teams data with minimal downtime and no data loss. Here is how we deliver a smooth Office 365 tenant migration.
Your current environment
Existing tenant, on-premises Exchange, or a third-party platform.
Discovery and Assessment
We map your current environment in full, from mailbox sizes and data volumes to third-party integrations and business-critical workflows. This discovery phase surfaces risks early and shapes a migration plan built around how your business actually works.
Migration scope definedMigration Planning and Design
With the scope agreed, we design the migration in detail: the project timeline, the data in scope, and the security and compliance controls that apply. We plan user impact, coexistence and communications so your team knows exactly what to expect at each stage.
Detailed migration planData Preparation and Protection
Before anything moves, we prepare and protect your data. We clean and organise mailboxes, files and SharePoint content, remove duplication, and run pre-migration checks so your data lands in the new tenant intact, structured and secure.
Data validated and securedPhased Migration Execution
We migrate in controlled phases using proven, industry-leading tooling to keep downtime to a minimum. Email, files, permissions, SharePoint and your other Microsoft 365 workloads move across in a sequence designed so your team can keep working throughout.
Workloads migratedPost-Migration Support and Optimisation
Once migration is complete, we verify that every mailbox, file and permission has transferred correctly and that users can sign in without issue. Our support team stays on hand to resolve any post-migration queries and to help your team get the most from the new environment.
Verified and supportedYour new Microsoft 365 tenant
Fully configured, secured and ready for your team to work in.
Every migration is tailored to your environment. Timelines and phasing vary with data volume, mailbox count and complexity, and we confirm the exact plan with you before any data moves.
Benefits of Migrating to Microsoft 365 with SA1 Solutions
Seamless transition, minimal downtime
A phased cutover keeps your team working while mailboxes, files and SharePoint content move to Microsoft 365.
Enhanced data security and compliance
Secure tooling and methods protect your data in transit and keep the migration aligned with your compliance standards.
A migration tailored to you
A plan built around your tenant, your users and your priorities, from a small team to a large enterprise estate.
Expert support at every step
A knowledgeable UK-based team is with you from planning and execution through to post-migration support, so questions get answered and issues get resolved quickly.
Cost-effective, efficient delivery
A streamlined, well-planned migration cuts wasted time and rework, so you get maximum value from your move to Microsoft 365 without unnecessary cost.
What We Migrate to Microsoft 365
A migration is only successful if everything comes with you. We move your full Microsoft 365 estate from your current environment, from email and files through to SharePoint, Teams and the permissions that hold it all together.
Email and mailboxes
Exchange Online mailboxes, shared mailboxes and archive data.
Calendars and contacts
Personal and shared calendars, plus your contact lists.
OneDrive files
Personal files and folder structures, with sharing preserved.
SharePoint sites
Team sites, document libraries and the content within them.
Microsoft Teams
Teams, channels, conversations and shared files.
Groups and distribution lists
Microsoft 365 groups, distribution and mail-enabled security groups.
Permissions and access
Delegate access, folder permissions and sharing links.
Rules and settings
Inbox rules, signatures and mailbox configuration.
If it lives in your current environment, we have a plan to bring it across cleanly.
Contact us today
Contact SA1 today to find out more information about how we can manage help your organisation become more protected.