TechnoKOZ recently assisted another iPhone – Exchange customer who was receiving this strange Error Code: [0x80004005].

This event error log message is related to a port IP conflict with the Microsoft DNS server and ActiveSync AUD service. You have to exclude these ports from the DNS server “pool” to prevent conflicts.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\ReservedPorts

Add the following ports to the key, without removing any of the existing entries.

2883-2883 – Used by AUTD
4500-4500 – Used by IPSEC
1812-1813 – Used by IAS
1701-1701 – Used by L2TP
1645-1646 – Used by IAS

Remember, TECHNOKOZ is available each day from 5:00 a.m. to 11:00 p.m. 480.440.4650 // Skype: TECHNOKOZ We are still assisting more and more customers from AROUND THE WORLD. We look forward to solving your Exchange ActiveSync issues too! You will not regret making the call.