How a Dutch water council migrated from GroupWise to Zarafa
The "Waterschap Hoogheemraadschap De Stichtse Rijnlanden" is one of the larger Dutch councils responsible for water management and every task that comes with this job like controlling the water barriers, levels and quality. Recently, they've decided to move all 450 users from GroupWise to Zarafa.
Remke Schuurmans (System administrator at Hoogheemraadschap) shares valuable experiences in this blog post. Read blog post http://www.zarafa.com/blog/post/2014/02/migrating-groupwisenovell-zarafaad