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Timeline: Aventis' Exchange Server 2000 Global Migration

By Robert L.Mitchell
April 7, 2003 12:00 PM ET
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Computerworld - Fall 1999
Hoechst Marion Roussel Inc. and Rhone-Poulenc SA merge; Aventis formed.
Combined companies had:

  • 55,000 users in 50 countries.

  • Nine e-mail systems running on 181 Exchange 5.5 servers (40 routing servers).

  • One GroupWise e-mail server.

  • A Windows NT backbone with 11 account domains, 150 resource domains, two Domain Name System servers and two Windows Internet Naming Service servers.

  • A 22-server test lab constructed by the messaging group replicating six real-world domains; Windows 2000 and Exchange 2000 testing begins.


February/March 2000
  • Active Directory infrastructure established through in-place upgrades of domain controllers to Windows 2000.


April 2000
  • Last account domains migrated to Active Directory.

  • Backbone upgraded to Windows 2000.

  • Exchange Server 2000 migration began at Frankfurt and Kansas City, Mo., pilot sites.

  • Exchange Conferencing Server set up in Frankfurt in pilot.

  • Backbone routers reconfigured to support multicast.


May 2000
  • Active Directory Connectors installed and connection agreements started to be established with Exchange 5.5 servers at each location.

  • Kansas City pilot site went live with first Exchange 2000 deployment; 4,000 mailboxes on 11 servers consolidated to four Exchange 2000 servers.


January 2001
  • WAN routers began to be reconfigured to support multicast for videoconferencing.


April 2001
  • Outlook Web Access servers rolled out in Frankfurt.


November 2001
  • Tokyo cut over 3,500 mailboxes.


First quarter 2002
  • All WAN routers reconfigured for multicast.

  • SecurID authentication added for Outlook Web Access users.

  • Frankfurt cut over 8,000 mailboxes.

  • Conferencing server rollout completed; all routers enabled for multicast.


May 2002
  • Croix de Berny, France, the largest site, cut over 13,000 mailboxes.


December 2002
  • U.S. headquarters in Bridgewater, N.J., migrated 6,000 mailboxes to Exchange 2000.


Spring 2003
  • When the last sites cut over, Aventis will have consolidated to 179 Exchange Servers (139 user servers and 40 connector servers), despite adding 40 new sites. It will have a single account domain, pharma.aventis.com, and approximately 130 domain controllers worldwide.


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