Event submitted by Event Log Doctor
Event ID:
Server ActiveSync

IP-based AUTD failed to initialize because the processing of notifications could not be setup. Error code [0x80004005]. Verify that no other applications are currently bound to UDP port [2883], or try specifying a different port number.

Solution by Event Log Doctor

2008-09-13 23:10:23 UTC

This error is somewhat critical and will probably prevent any mobile device that uses ActiveSync from receiving push notifications.

The installation of patch 951746 and/or 951748 causes this problem as soon as you reboot, a result of enhanced security for DNS.

To resolve this problem, see the additional links below - or - as a quick fix - navigate to this registry key:


and edit the "ReservedPorts" value by ADDING the following lines:


This change requires a reboot, and the fix resolved our problems immediately after the reboot.

Solution by dejanzdr

2011-11-16 07:10:09 UTC

In my case the DNS process ID was using UDP port 2883.
You can check this by running
netstat -ano|more
looking for UDP and cross-reference the PID in the Task Manager.
After restarting DNS service, the port returned to the w3wp service and the error message will despair immediately ( reboot is no required)

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