Since google/blogger enable the domain switching option, people had been facing one problem or the other and one of this is "
We have not been able to verify your authority to this domain. Error 32. Please follow the settings instructions."
Are you facing this same problem? Here is the solution to tackle the general problem caused by changes in google/blogger DNS Settings.
If you know how to set up your DNS configuration to point to blogger, you will know that we only use one CNAME, which is Name: [www] and the Destination or Target: [ghs.google.com].
But now google/blogger added another CNAME which is more of verifying you as the owner of the blog.
How to get the second CNAMETo get the second CNAME, you need to login to your blogger account at www.blogger.com, then click on the blog you want to switch its domain to enter your dashboard.
Then Go to Settings > Basic and then click on "+Add a custom Domain" and type in your new domain http://www.yourname.com then click on "Settings Instruction".
A pop up will ask you if you want to leave the page. Click one "Leave this Page" then on the next page click on "On a top Level Domain" then your second CNAME or I will call it a verification CNAME that looks like this Name: [some codes] and the Destination or Target: [gv-[security code].domainverify.googlehosted.com]. This codes are generated just for your blog so don't copy any code from anywhere.
Copy the Second CNAME and insert it into your DNS Management in your hosting providers CPANEL and wait for 1 or 2 hours for it to be activated.
Go back to your Blogger Dashboard > Settings > Basic and +add a custom Domain and your new domain is at work.
Note: If you are still seeing the same error, check the tutorial again from the top and make sure you did not miss any step.