Error connecting Mobile phone to SBS2003 & Exchange

We are trying to setup a user with a Windows Smart phone to sync with an Exchange Server but are unable to get email syncing. The Calendar, Tasks & Contacts all Sync but not email. The following error is in the event log on the SBS:

Event Type:      Error
Event Source:      Server ActiveSync
Event Category:      None
Event ID:      3005
Date:            15/04/2009
Time:            12:19:08
User:            C4U\sabiggs
Computer:      SERVER
Unexpected Exchange mailbox Server error: Server: [server.DOMAIN.local] User: [] HTTP status code: [500]. Verify that the Exchange mailbox Server is working correctly.

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Any suggestions would be greatly appreciated.
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cybis1Author Commented:
Not resolved. We have go around the problem for now by using IMAP.

Thanks all.
do other users work?

The user is enabled for activesync ;-)
Ensure that the user in question has an email address in the default domain.
For example, if your WINDOWS domain is example.local and your public email domain is, then the user needs to have an email address in both example.local and

cybis1Author Commented:
In answer to Flaphead...this is the first phone to use email this way here.

And in answer to Mestha: The use has both a .com & a .local address on the SBS2003 user properties.

The user is also member of Mobile USers group as well as Remote Web Workspace Users.

First thing to do is test the server externally using a test account:

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