Check for a network connection with the exchange server to fix Outlook sending error 0x800ccc0f.
You can check both the access gateway and the internet connection for this. Make sure the settings and configuration are correct as well.
Step 1: In the browser, type any website's URL. If it opens correctly, it means it has internet connectivity.
Step 2: If you have a problem, right-click on the Ethernet cable connection and Wi-Fi signal to troubleshoot the network connectivity issue. Then, in the presented window, select 'troubleshoot difficulties.'