One of the common Microsoft Outlook problems is the ‘RPC is not configured properly’ problem. The error occurs when you try to connect to your Exchange Server mailbox in Outlook 2007 or 2003. The error is caused by missing registry values viz. ncacn_np (rpcrt4.dll), ncacn_ip_tcp (rpcrt4.dll), ncacn_http (rpcrt4.dll), and ncadg_ip_udp (rpcrt4.dll) in Windows Registry Editor. Check the steps given below and fix this Microsoft Outlook error:
1. Click the Start menu> go to Run, type ‘regedit’ in the box and click OK.
2. On the Registry Editor window, map read to HKEY_LOCAL_MACHINE> SOFTWARE> Microsoft> Rpc> ClientProtocols.
3. Click the ClientProtocols folder and check if you have all these keys under it: (1) ncacn_np rpcrt4.dll, (2) ncacn_ip_tcp rpcrt4.dll, (3) ncacn_http rpcrt4.dll, and (4) ncadg_ip_udp rpcrt4.dll.
4. If you find any of or all the values missing, then add these keys manually to the registry. To do so, go back to the ClientProtocols folder> right click it> select New> and then String Value.
5. Type the name of the missing key. For example ncacn_np rpcrt4.dll is missing, type only ‘ncacn_np’ (without quotes and as is) in the box and hit Enter on the keyboard.
6. You will see the key appearing in the right hand panel. Now right click this key and select Modify. Now type the value data (the value data for ‘ncacn_np’ will be ‘rpcrt4.dll’) in the Value Data box and hit Enter on the keyboard.
7. You will need to repeat these steps until all the missing keys start showing up in the Windows Registry Editor under the ClientProtocols folder. Make sure that whenever you type any key name or its value data, it should be typed without quotes and as is).
8. Exit Registry Editor and other windows. Reopen Microsoft Outlook. It should work fine now.
***The value data for all these keys will be their preceding values (for e.g. rpcrt4.dll).