Disable Outlook MAPI (RPC) Fallback

Microsoft Outlook 2010 will fallback to an RPC (MAPI) connection if Outlook Anywhere (RPC/HTTPS) is unable to connect.  In certain situations, like troubleshooting, it’s valuable to disable this behavior.  This can be accomplished by setting the DisableRpcTcpFallback registry key located at HKCU\Software\Microsoft\Office\14.0\Outlook\RPC to “1”.

DisableRpcTcpFallback Screenshot

To disable this just set the value to 0 or delete the key.


Posted in Exchange, Troubleshooting, tweaks

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