delete synced calendar and contacts on windows mobile 5

I am setting up some Mobile 5 iPAQ's and been playing wih various activesync exchange server email accounts etc. After finishing my testing and deleting my Exchange server settings I get the message:
"..contacts calendar and tasks will remain on the device"

sure enough who ever creates a new account in activesync gets all my test accounts calendar and contacts. How can I remove all stored calendars and contacts without a hard reset?
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Mikal613Connect With a Mentor Commented:
a delete Go to ActiveSync
Then Menu > Options > Server Settings > Contacts > 
Then Sync Contacts with server
A warning message will appear saying that items of this type already exists. It will prompt you whether you want to delete the items from your device.
Select it and it should delete off all contacts.

Same thing for Calendar
I have tried this solution, it does not work.  Does anyone have any recommendations on what to use to delete the dups or to purge the contacts and Calendar?
PeteAuthor Commented:
sadly i ended up doing a hard reset...!
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