I ran into the following issue when migrating about 20 users from Exchange to Zimbra, using the migration tool. For at least one of the users (I haven't asked any others yet), their colors for their calendar items were not correctly migrated, instead, they get a bunch of gibberish for their location field on all their items. Any idea on what might be causing this? The Exchange version is Exchange 2000 on Windows Server 2000, and the Zimbra version is the latest.