XCSI/PRE/E2K3/Unable to synchronize with Exchange server using Active Sync

Source: Microsoft Support

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While trying to sync with the Exchange server we receives following error message on the Mobile device:

We will receive this error message if we have a Firewall and not allowed a Rule on the Firewall for Microsoft-Server-ActiveSync

If customer has a ISA firewall inform the customer to add rule to allow Microsoft-Server-ActiveSync and that will resolve the issue

We receive this error, if the customer has a firewall and rule is not created on the Firewall for Microsoft-Server-ActiveSync

Create a rule on the Firewall which will allow Microsoft-Server-ActiveSync traffic to pass through it and that will resolve the issue

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