How to Fix Outlook Error 0x800ccc0f

In Microsoft Outlook, it’s not uncommon to run into some issues when trying to use the application. We have already looked at the 0x800ccc0e error within Microsoft Outlook, and the error we are looking at today is not too dissimilar, given that both errors serve to prevent the user from sharing emails in some capacity.

In order to resolve the error titled 0x800ccc0f, you must edit your firewall settings, as it will be these that are causing the error to appear in the first place, due to 0x800ccc0f relating to connectivity being prevented due to the firewall. To do this, you must access your Windows Firewall Defender settings via the Control Panel of your computer.

Now, as is the case with every blog, do not worry if the above is not enough detail for you to work with. Not only will there be a step-by-step guide to the process, but there will then be a more thorough walkthrough of the method should you need it.

Step by step: How to Fix Outlook Error 0x800ccc0f

  • Search for the ‘Control Panel’ in the Windows search bar.
  • Click on the ‘System and Security’ option within the Control Panel.
  • From here, click ‘Windows Defender Firewall’.
  • Look to the side and click ‘Turn Windows Defender on and off’.
  • Under ‘Public Network Settings’, turn off the Windows Defender.
  • Click ‘OK’ to save your settings.

We’ve also created a YouTube video to help you fix this Outlook error. Watch it here:

Again, whilst this may be enough for some of you to work with, there will now be a further analysed look at the process, complete with accompanying screenshots that have been annotated to best assist you.

To begin the process, you will first want to access your control panel. Now, you can search for this manually through your settings, but that will prove menial and tedious. It may be attached to your toolbar, in which case, simply click the icon. Otherwise though, look towards your Windows search bar at the bottom of your screen, search for ‘Control Panel’, and click the first option.

Once you have opened the control panel, you will be greeted with an array of options that can each be edited to further benefit your computer. Of all the options listed, you will want to look for the heading titled ‘System and Security’, which is one of the first choices you are presented with.

It is important to note that you should always look to click the heading as opposed to any of the blue text below it. The blue text serves as a brief contents page, listing to you a select few of many other options that have been bracketed under a certain category. The green text, however, serves as an overview, presenting you with every possible option of that bracket should you click on it.

Once you have entered the sub-menu that is System and Security, you will want to find the section titled, ‘Windows Defender Firewall’. Click on this, whilst again, ensuring that you opt to click the titled heading, not any of its listed contents beneath it.

Following this link will, yet again, take you to a new menu. From here, you will want to look towards the left-hand side of the screen, where there will be a list of many options you can explore. Of all those listed, you will want to click the one titled ‘Turn Windows Defender Firewall on or off’.

The screen you will be presented with, from here, will be the final one you need in order to complete this process. You will be shown your current protection settings for private and public networks, with the default being that Windows Defender Firewall is active, serving to defend your computer to the best of its ability.

Whilst you should look to leave the private settings as they remain, it will be an option of the public settings that you will want to change. Whilst it will have, as aforementioned, set Windows Defender Firewall to being on, you will want to turn that off, as so:

That step is annotated by the number 1 on the screenshot above. To save your changes, look towards the number 2 on the image, nestled next to the ‘OK’ option that you will want to click to make these alterations permanent.

After doing that, you should have now successfully resolved your Outlook error, 0x800ccc0f!

In case you are curious as to how this solves the process, it seems logical to offer a brief explanation. The firewall is what caused the initial fault, heavily impacting the connectivity between the client and the server. As such, by disabling the Firewall, even if you wish to only do so temporarily, then you will have severed the issue and will have provided a much greater quality of connection between the client and server that would otherwise have remained hindered.

Thank you for taking the time to read this blog, I hope you found it as helpful as you first wanted it to be! As is the case with all of our work, if you encounter an issue when following the walkthrough, or simply wish to let us know your thoughts on any of it, then please do not hesitate to get in touch with a member of our team.

Below are some links to blogs of a similar topic to this one. If this blog didn’t quite answer the questions you were having, then perhaps some below may be of assistance.

How to fix: Outlook error 0x800ccc0e – Business Tech Planet
(This article looks at an error similar to this one, but it instead focuses on an error in sending emails. It is resolved, similar to this issue, via the Control Panel).

How to fix error: “a custom mail flow rule created by an admin has blocked your message”: Office 365 – Business Tech Planet
(This blog piece focuses on an error involving custom mail flow, which can be resolved by editing the ‘inbox and sweeping rules’ under ‘Mail Flow’).

How to fix “Sorry, you need to sign out of Teams and sign in again” error – Business Tech Planet
(The final recommended article, this blog post details an error involving signing in to Microsoft Teams. To solve it, you must access the ‘Manage COM Add-Ins’ aspect of your settings).

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Michael Fontana

Michael Fontana has been the managing director of telecoms and MSP Optionbox for over a decade and has worked in various telecommunication roles over the last 20 years. Michael has been involved in many exciting projects, such as co-founding telecoms and IT businesses and has now built up a team of more than 15 staff, serving over 300 clients nationwide. With a wealth of experience in IT and a passion for technology, Michael is now helping BTP to produce the highest quality guides on the internet. You can connect with Michael on LinkedIn.

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