Network Edition customer. Using ZCSExchangeMigrationWizard-4.5.6_GA_1023 Version 4.5. Migration of large mailbox fails partially through folder import. From log:

25-07-2007 15:34:39 [7572]: Progress log is: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ZCSExchangeMigr ationWizard-4.5.6_GA_1023\a09c6ad57aef5ad82c69fe8285010760.m2l
25-07-2007 15:34:39 [7572]: Zimbra::MAPI::MailboxScanner::Scan. calling NamedProps::Init() using the root store folder
25-07-2007 15:34:39 [7572]: Zimbra::Mapi::NamedProps::Init. NamedProps::Init() succeeded!
25-07-2007 15:34:39 [7572]: Starting mid scan
25-07-2007 15:34:39 [7572]: Clearing internal progress log entries
25-07-2007 15:34:39 [7572]: Entries cleared
25-07-2007 15:34:39 [7572]: Unknown exception occured, skipping to next mailbox
25-07-2007 15:34:39 [7572]: Exception Address: 0x43a013
25-07-2007 15:34:40 [7572]: CORE: Generated core dump: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ZCSExchangeMigr ationWizard-4.5.6_GA_1023\ZimbraCore_07252007_153439.dmp
25-07-2007 15:34:40 [7572]: Waiting for work
25-07-2007 15:34:40 [7572]: Worker thread exiting

Deleting the mailbox and retrying fails at same point.

Separately, am having trouble migrating calendar from SBS 2003. As far as I can tell How to Allow Mailbox Access only helps me if I have Exchange 2007. Anyone have exp w/ this that would be helpful?