We are having a problem with a Small Business 2003 server in that Active Sync is working intermittently, e-mails will download in blocks intermittently and at random.
Outlook Web Access and Outlook internally are not experiencing any problems.
We have tried;
Reinstalling .NET 1.1
Removing any other versions of .NET
Checking all permissions on the IIS directories/instances
Rebooting the server
Creating a new mailbox
Different devices (iOS and Android)
Re-installing Exchange SP2
When it is failing, the following error can be seen in the event logs;
Unexpected Exchange mailbox Server error: Server: [SERVER.domain.local] User: [email@example.com] HTTP status code: . Verify that the Exchange mailbox Server is working correctly.
OMA fails with the following error
A System error has occurred while processing your request. Please try again. If the problem persists, contact your administrator.
Can anyone offer any ideas?