If you continue to receive this message, contact your server administrator or Internet service provider (ISP).
Then why does this error appear?
So how to fix the Outlook error 0x80042108?

Keep on your reading and you’re able to find multiple methods.
you might open an Internet surfing app and visit any website to ensure that the Internet connection is working.
If your Internet connection is busted, try resetting the router.

Alternatively, theInternet Connections Troubleshooterin Windows may also help repair the Web connection.
Step 2: ClickUpdate & Securityand then go to theTroubleshoottab.
Step 3: ClickInternet Connectionsand then clickRun the troubleshooter.

Step 5: initiate the Outlook and then find out if the error 0x80042108 is fixed.
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These Methods Are Available!
Here is the way to deactivate the Windows Firewall:
Step 1: Entercontrol panelin theSearchbox and then pressEnter.
Step 2: SetView by: Small iconsand then clickWindows Defender Firewall.
Step 3: Then clickTurn Windows Firewall on or off.
Step 4: Choose both theTurn off Windows Firewall (not recommended)options and then clickOKto save changes.
Step 5: look to see if the error is fixed after disabling the Windows Defender Firewall.
Step 2: ClickPrograms and Featuresto open a new window.
Step 3: FindMicrosoft Officein the list and click it to chooseChange.
Step 4: Choose theReinstall or Repairoption and clickNext.
Step 5: ChooseReinstall Officeand then clickInstall.
ClickOKafter the process is finished.
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