Office 365 Tenant Consolidation After Multiple Acquisitions

Challenge

An organization that had completed several acquisitions needed to consolidate the acquired businesses from separate Microsoft 365 tenants into its primary environment. Each migration involved user mailboxes, shared mailboxes, OneDrive data, SharePoint Online sites, Microsoft Teams content, groups, contacts, mail routing, Outlook profile transitions, and post-cutover support — requiring a controlled approach that preserved collaboration data and maintained business continuity.

Approach

Safari Micro built a repeatable migration framework covering assessment, preparation, staging, migration, cutover, and post-cutover support. BitTitan MigrationWiz was used for Exchange Online and OneDrive migrations; ShareGate handled SharePoint Online and Teams migrations including site mapping and permissions planning. Safari Micro also coordinated end-user communication, validated Outlook profile transition behavior, and supported domain cutover including MX record changes, custom domain transfer, and alias assignment.

Results

• 343 user, shared, and resource mailboxes migrated
• 75 Microsoft 365 Group mailboxes consolidated
• 242 OneDrive migrations completed
• 188 SharePoint Online sites moved with permissions preserved
• 41 Microsoft Teams migrated including connected content
• Custom domain removal, transfer, and alias assignment completed
• One week of post-cutover support delivered per migration phase