Modern Workplace Transformation at Hotelplan – secure Separation, seamless Migration.

From a single Tenant to two independent Platforms – driven by two separate Divestments.

Following the sale by Migros, the Hotelplan Group found faced a unique situation: Hotelplan and Interhome were sold to two different owners. The previously shared Microsoft tenant was therefore no longer viable – a complete IT separation was necessary to accommodate different structures, governance requirements, and future strategies.

This significantly increased the complexity: Instead of a single migration, two independent Microsoft 365 tenants had to be set up in parallel – each with its own identity, security baseline, and operating model. Data and services that had become tightly intertwined over the years had to be neatly separated and assigned to the correct target environments without disrupting ongoing operations. Shared Teams, SharePoint sites, mailboxes, and distribution lists had to be clearly divided and migrated. This required dual coordination streams, synchronized cutover planning, and close alignment with both organizations throughout the entire process.

The scope was substantial: thousands of users and devices, as well as hundreds of teams, were transferred to two completely separate tenants. The goal was not only technical separation but also the creation of two modern, secure, and future-ready workplace platforms that employees could use immediately from day one.

Two modern Microsoft 365 Tenants – with different Architectures to support different Visions for the Future.

Structured Migration across two Environments – global, without Reinstallation, and with minimal Impact on Users.

The complexity of this project was less about volume and more about executing two parallel, independent migrations with different architectures, timelines, and a highly interconnected legacy environment. Accordingly, the project followed a clearly structured approach with close coordination between Hotelplan and Interhome.

Following initial workshops, the architecture and migration strategy were defined. This was followed by the setup of the tenants, a complete inventory, and several proof-of-concepts to identify risks early on and prepare for the cutover. A key challenge was device migration: Thousands of devices in use worldwide were distributed across the two target tenants without requiring reinstallation. For users, everything remained business as usual – with no data loss or disruption to productivity.

Data migration was executed as a carefully orchestrated weekend cutover, handled separately for each tenant. Thanks to rigorous planning, extensive testing, and close collaboration with Epic Fusion, the project was delivered on schedule and largely without operational disruption – despite its dual complexity.