outlook2003无法完成同步

zhaoo

服务器是exchange2000
客户端：outlook2003

设置了use cached exchange mode和 offline folder.
online情况下，很正常，inbox里可以看到最新的邮件；
offline情况下，inbox里只能看到部分很早以前的邮件，没有新邮件可以看到；

log file如下:

11:07:40 Synchronizer Version 11.0.6555
11:07:40 Synchronizing Mailbox 'xxxxx(RT-SH)'
11:07:40 Synchronizing Hierarchy
11:07:46 Synchronizing server changes in folder 'Inbox'
11:07:46 Downloading from server 'xxxx.com'
11:07:55 Error synchronizing folder
11:07:55    [80004005-501-80004005-560]
11:07:55    The client operation failed.
11:07:55    Microsoft Exchange Server Information Store
11:07:55    For more information on this failure, click the URL below:
11:07:55    http://www.microsoft.com/support/prodredirect/outlook2000_us.asp?err=80004005-501-80004005-560


恳请各位赐教，谢谢大家。