Avanade and Accenture helped TeliaSonera migrate 20,000 PC’s to Windows 7 in an environment with nearly 2,000 applications

Business Situation

TeliaSonera AB, the leading telecoms company in the Nordics, wanted to move its 20,000 employees  from Windows XP to new Windows 7 machines. In addition, the company was also using thousands of legacy applications on the ageing XP  Operating System (OS).

With Microsoft about to withdraw support for the old operating system, TeliaSonera wanted to migrate to the latest version to; reduce risk, cut maintenance costs and provide its staff with a modern computing environment, including the latest collaboration software.

"We had very close cooperation with Avanade and Accenture. Avanade’s expertise and competence in the Microsoft environment made the ‘application factory’ concept work so well."

Markku Mononen VP and IT Director, TeliaSonera

Customer Solution

​TeliaSonera worked with Avanade and Accenture to define the scope of the project, to ensure the right approach and budget. This allowed TeliaSonera to build a clear business case and establish a realistic 18-24 month timeframe for the project. The scope included both the application migration and the migration to Windows 7, moving all 20,000 users, including peripheral devices and files to the new machines seamlessly and without fuss.


​As a result of Avanade and Accenture’s efforts, the application migration was completed successfully and on time, allowing the hardware deployment to go ahead as planned.

The project helped TeliaSonera achieve its business goals in other areas.
  • Reduced support costs
  • Improved employee productivity
  • A solid foundation for future growth

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