This is a discussion on Exchange 2007 Calendar Sync? within the Droid General Discussions forums, part of the Droid Discussions category; Another possible solution for Calendar sync. This came from from the Moto forum.
Do these steps fix the calendar syncing issue for you?
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I had the same problem, email was synched but no calendar, it would say "authentication failed"
Go into your corporate webmail (OWA) and select "Mobile Devices" and then remove Android from the list. Then quickly before it can reconnect, remove the account from the Droid. Have the screen on the droid ready to go so you can remove your account on the phone immediately after you remove the phone from the connection list on your OWA screen on your computer.
Then recreate your exchange account on the droid and let it synch all of your email. After all of your email is current, then open the corporate calendar. It should synch your calendar then. (it did for me)
Lobo - Did your OWA Mobile Devices list one called Droid########## and one called Android############# ?? Mine has two listed.
-Mark
Originally Posted by loboblanco
I had the same problem, email was synched but no calendar, it would say "authentication failed"
Go into your corporate webmail (OWA) and select "Mobile Devices" and then remove Android from the list. Then quickly before it can reconnect, remove the account from the Droid. Have the screen on the droid ready to go so you can remove your account on the phone immediately after you remove the phone from the connection list on your OWA screen on your computer.
Then recreate your exchange account on the droid and let it synch all of your email. After all of your email is current, then open the corporate calendar. It should synch your calendar then. (it did for me)
Your method doesn't work for people who are receiving "authentication error" You have to remove the association from the OWA screen on the exchange server website, then delete the account on the Droid, then start over. I believe people with 2003 are getting "authentication error" and people with 2007 are getting "synch error"