AstraZeneca chose to upgrade its reliable but outdated e-mail infrastructure, and HP Services and Microsoft designed an e-mail environment based on Microsoft Exchange 2003. HP managed the migration.
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The migration was conducted with both systems running in tandem in order to minimise disruption. HP Services said it was able to prepare and synchronise a considerable volume of data in advance, resulting in an average interruption time of only 15 minutes per user.
About 2,000 mail boxes were migrated each night, while the system continued to process one million e-mails a day.
Gary Keogh, global programme manager at AstraZeneca, said, "The process was smooth with very low call volumes to the help desk and a low level of business interruption."