FIX: The RPC server is unavailable Outlook error

by Aleksandar Ognjanovic
Aleksandar Ognjanovic
Aleksandar Ognjanovic
Troubleshooting Expert
Aleksandar's main passion is technology. With a solid writing background, he is determined to bring the bleeding edge to the common user. With a keen eye, he always... read more
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The RPC server is unavailable is a common error and it occurs in many network-based services, not only Outlook. The Remote Process Call server is a protocol that allows programs on one PC to access certain services of a program on a PC that’s on the same network. It’s quite important for the seamless network workflow.

Today, we’ll show you how to fix the error and allow Outlook to work without a halt.

How do I fix The RPC server is unavailable Outlook error?

1. Check the Firewall

The first thing to do is to confirm that the RPC server is allowed to communicate through Windows Firewall. Allowing it to freely communicate is simple, so here’s how to do it:

  1. In the Windows Search bar, type Firewall and select Allow an app through Windows Firewall.
  2. Click Change settings.
  3. Make sure that the Remote Assistance is allowed to access both private and public networks.firewall remote assistance outlook the rpc server is unavailable
  4. Confirm changes, reboot your PC, and look for improvements.

2. Make sure that the RPC-related services are running

The next thing to do is to ensure that RPC-related services are running. They usually start automatically, but there are more than a few reports about the system shutting them down. Follow these steps to enable them:

  1. Press Windows key + R to open the Run command line.
  2. Type Services.msc and press Enter.
  3. Now, find these 3 services and make sure that they are running:
    Remote Procedure Call
    Remote Access Connection Manager
    and Remote Access Auto Connection Manager.
  4. If they are not running, open each service separately and set the Startup Type to Automatic.
    services remote services outlook the rpc server is unavailable

We’ve written extensively on Outlook server issues. Check out these guides for more information.

3. Flush DNS

The next step, with the services running in the background, is to flush DNS and renew IP. This seemingly helped a lot of users deal with The RPC server is unavailable error on Outlook.

Follow these steps to flush DNS and renew IP:

  1. In the Windows Search bar, type CMD.
  2. Right-click on the Command Prompt and run it as an administrator.
  3. In the command line, type the following entries and press Enter after each:
    dns flush outlook the rpc server is unavailable
    ipconfig /registerdns
    ipconfig /release

    ipconfig /renew
    netsh winsock reset
  4. Reboot your PC and try accessing Outlook again.

4. Repair Outlook

Finally, you can try and repair Outlook. This is a far-fetched solution but it might help on some occasions. Follow the steps below to reinstall Outlook on your PC:

  1. From the Start menu, open Control Panel.
  2. Select Add or remove programs.
  3. Click on the Office and select Change.
  4. Choose to Repair your installation and look for changes.
    repair office outlook the rpc server is unavailable

That should be that in regards to The RPC server is unavailable Outlook error. If we helped you, make sure to tell us in the comments section below.


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