Have you ever encountered this situation?
While sending or receiving emails, the Outlook error 0x800ccc0f occurs.
In this case, you could try the methods mentioned by this post fromMiniTool Solution.

Hope these methods can help you.
You may encounter the Outlook error 0x800ccc0f when you make a run at send or receive emails with Outlook.
If this problem continues, contact your server administrator or Internet service provider (ISP).
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Right now, get rid of the 0x800ccc0f error following the instructions from this post.
If you find that Outlook couldnt complete your search and you want to fix it, read this post.
you’re able to get some useful solutions from this post.

Hence, it’s possible for you to simply see if the websites are opening in your online window.
If not, then the problem is obviously because of a connection error.
As for the third-party antivirus utility, you could have a go at disable, pause or exit it.

Alternatively, you’re free to also temporarily remove it from the Windows startup.
Step 1: TypeWindows Firewallin theSearchbar and clickWindows Defender Firewallto open it inControl Panel.
Step 2: ClickTurn Windows Defender Firewall on or offfrom the left pane.
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Step 3: Check both theTurn off Windows DefenderFirewalloptions there, and then click theOKbutton.
Meanwhile, you could verify if Outlook is permitted through the Windows Defender Firewall.
Here is a quick guide.
Step 1: OpenWindows Defender FirewallinControl Panelagain.
Step 2: ClickAllow an app or feature through Windows Defender Firewall.
Step 3: ClickChange settingsand then findOutlookin theAllowed apps and featureslist.
Step 4: Check both Outlooks check boxes.
Step 5: Then clickOKto confirm the new setting.
Now, the 0x800ccc0f error should be solved.
Method 3: Increase the Server Timeouts Setting in Outlook
Outlook includes a Server Timeouts bar.
You drag it to a longer setting to fix interrupted connections.
Hence, you’re able to increase the Server Timeouts setting in Outlook to fix the error 0x800ccc0f.
Step 1: Open theOutlooksoftware and clickFilein the top left corner.
Step 2: ClickAccount Settingsand chooseAccount controls…to open theE-mail Accountswindow.
Step 3: ClickChange…>More configs.
Step 4: ClickAdvancedand then drag theServer Timeoutsbar to the far right.
Step 5: ClickOKto kill the window.
The Inbox Repair tool in Outlook can help you fix data files.
Step 1: Completely close Outlook and all associated applications.
Step 2: Download the Inbox Repair Tool by clicking thislink.
Step 3: Double-smack the installation file to open it.
ClickAdvanced, then checkApply repairs automaticallyand clickNext.
Step 4: Wait until the scan finishes to detect the problems with your Outlook .PST file.
If there are any inconsistencies found, the Inbox Repair tool can automatically recommend viable repair strategies.
Step 6: Once the process is complete, reboot your PC and run Outlook again.
Now, look to see if the error 0x800ccc0f is resolved.
It will show you 4 useful methods.
Bottom Line
After reading this post, you should know how to fix the 0x800ccc0f Outlook error.
Hope they are useful to you.