National Institute of Interdisciplinary Science and Technology (NIIST) which earlier used Squirrel Mail and Sendmail for its E-mail system has now been migrated to Zimbra Open Source Collaboration Suite 7.0.
Migration process has been smooth without taking any downtime on the E-mail system. 250+ mailboxes consisting of around 50 GB of data have been seamlessly migrated to Zimbra.
Planning, Scripting, Migration and Integration took 2 weeks to complete.