ActiveSync not working for few mailboxes

ActiveSync not working for few mailboxes. It is SBS 2003 server with Exchange 2003 SP2.

Action Taken So far:
- DS2MB
- Repaired the Database

Stangre thing just discovered now is ActiveSync properly working for the newly created mailboxes.
LVL 34
Shreedhar EtteAsked:
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Neil RussellTechnical Development LeadCommented:
Are there FEW mailboxes administrative user accounts?
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Carol ChisholmCommented:
Did your users that have problems come from and oder SBS. Look at the groups they are members of. If they are admins or account admins it won't work.

Also check in that the accounts inherit their permissions properly:

http://alanhardisty.wordpress.com/2010/03/05/activesync-not-working-on-exchange-2010-when-inherit-permissions-not-set/
http://blog.nick.mackechnie.co.nz/post/2009/11/20/Exchange-2010-Active-Sync-Issue.aspx
http://aztech.net.au/node/137
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TekyguyCommented:
Make sure Active Sync is enabled for said users.
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Shreedhar EtteAuthor Commented:
@Carolchi: Issue is with Exchange 2003.

@Neilsr: Only couple of mailboxes are member of administrator

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Shreedhar EtteAuthor Commented:
Forgot mention that Sync issue is with the Inbox. All other things like Contacts, Calendar are Syncing properly for the effected user.
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TekyguyCommented:
What devices/device OS for working and not working?
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Shreedhar EtteAuthor Commented:
All are Windows OS based devices.
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TekyguyCommented:
What OS version? 4.0, 5.0, 6.0, 7.0?
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Shreedhar EtteAuthor Commented:
It is 6.0
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MegaNuk3Commented:
Normally it's an AntiVirus problem on the Exchange server.

I am sure you have seen this article before:
http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_1798-Exchange-2003-Activesync-Connection-Problems-FAQ.html
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Shreedhar EtteAuthor Commented:
@MegaNuk3: I follow this article first when ever i face issues related to Exchange 2003 ActiveSync.

Finally, We created a New Mailbox Store Database and Restore the database from the backup.
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MegaNuk3Commented:
Install this:
http://support.microsoft.com/kb/957191

and if that doesn't work, delete the exchange account off the mobile device then download the mobileadmin tool and delete the device pairings for the affected users

Then try setup a device again. Does www.testexchangeconnectivity.com work for the affected users?
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Shreedhar EtteAuthor Commented:
- We have updated Massync.dll 6.5.7655.0. After that also it does not work.

- Finally, We created a New Mailbox Store Database and Restore the database from the backup.
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MegaNuk3Commented:
so is it working now or not?
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MegaNuk3Commented:
Thanks for the update
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Shreedhar EtteAuthor Commented:
We created a New Mailbox Store Database and Restore the database from the backup.
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