Thanks for the link, I was able to upgrade ActiveSync, but I still have
the problem with failing to sync all of the messages in the inbox.
The messages which fail to sync seem to be consistent from sync to sync,
and I'm seeing less variability. But it remains true that when I repeat
the same test on Outlook 2002/Office XP, all of the messages are synced
to the Pocket PC.
Also, if I open and save any of the unsynced messages, ActiveSync will
immediately move them to the Pocket PC. However if I reset the Pocket
PC, and perform another initial sync, these messages will fail to sync.
None of the fields in these messages look to be significantly different
from messages which sync. I was thinking that the presence of field
0x1096 set to 2 or perhaps 0x6284 set to 0 might be suspects, but other
messages have 0x6284 set to 0 and sync without a problem.
I know that there is a new PST format for Outlook 2003, which differs
from Outlook 2002/XP, but I'm not sure how that would affect ActiveSync.