Yes...but it will depend greatly on your email service:
For POP, I don't think there is a way for Outlook to reconcile changes made at the server back to itself.
For IMAP, it can be done, but you must be sure that you've integrated the account into Outlook as IMAP.
If the account truly is full EAS, then that should work as well with Outlook, as long as it's been properly integrated to Outlook.
If this is instead a BESenvironment (you should be able to tell...if you see Notes and Tasks as also available for sync to your Z10, then it's BES), then you need to talk to your BES admins.
Occam's Razor nearly always applies when troubleshooting technology issues!
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