Error: Your Microsoft Exchange Server is unavailable

NOTE: Please follow these instructions only after you've succeeded with parts A and B in this support document: click here.

While trying to setup Microsoft Outlook 2000, Outlook 2002 (XP), or Outlook 2003 to connect to Microsoft Exchange Server, you received one of these errors:

• Your Microsoft Exchange Server is unavailable
  
  OR
  
  
• Outlook could not log on. Check to make sure that you are connected to the network and are using the proper server and mailbox name. The connection to the Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action.

RESOLUTION:

You may have to do one or both of the following to fix this error:

1. Your registry settings for RPC Client Protocols may be corrupted. Click here to download this file and execute it. In Internet Explorer, choose "Open" after clicking on the link. Accept the warning prompt about importing data into the registry. Setup MS Outlook and see if it works now.
   
2. Re-install TCP/IP. Instructions:

• Windows XP (Repair TCP/IP):
  1. Click on Start
  2. Click on Run
  3. In the text box, type "cmd" (without the quotes), and click on the OK button
  4. A new black window will open. Type: "netsh int ip reset c:\resetlog.txt" (without the quotes), and press the ENTER key.
  5. Type "exit" and press the ENTER key.
  6. Restart your computer
  7. Setup MS Outlook and see if it works now.
  
  
• Windows 2000 (Uninstall and reinstall TCP/IP):
  1. Log on as the local administrator.
  2. Close all open programs, and then disable any anti virus program.
  3. Right-click My Network Places on your desktop, and then click Properties.
  4. Right-click Local Area Connection, and then click Properties.
  5. Click Internet Protocol (TCP/IP), and then click Uninstall.
  6. You receive the prompt to uninstall TCP/IP, click Yes.
  7. Restart your PC.
  8. Log on as the local administrator
  9. Right-click My Network Places on your desktop, and then click Properties.
  10. Right-click Local Area Connection, and then click Properties.
  11. Click Install, and then click Protocols.
  12. Click Add.
  13. Click Internet Protocol (TCP/IP), and then click OK.
  14. Click Close in the Local Area Connection Properties dialog box, and then restart your computer.
  15. Setup MS Outlook and see if it works now.