I am looking at migrating a client from their MS Exchange email server to Google Apps for Business email. They are a small firm with 5 email accounts, but they are very heavy email users and have mailfiles of 2-3GB each, with various attachments.
As their existing email server is a service, I cannot install any software on it. I think the only option is to use the google apps desktop migration tool.
Has anyone had an experience (successful or otherwise) in migrating mailfiles of this size to google apps? How long does it take and what happens if there is a network interruption (ie: can you restart?). Are there any problems with attachments?