xfile86

Regarding domain verification there is useful info in Google Cloud: https://cloud.google.com/identity/docs/verify-domain

Domain verification using TXT record:

https://cloud.google.com/identity/do...ify-domain-txt

Verify your domain for your Google service

You verify your domain through your domain host (typically where you purchased your domain name). Your domain host maintains settings called DNS records that direct internet traffic to your domain name. For details, see Identify your domain host: https://cloud.google.com/identity/do...ify-host#48323

Google gives you a TXT verification record to add to your domain host's DNS records. When Google sees the record exists, your domain ownership is confirmed. The verification record does not affect your website or email.

Add a TXT verification record (any domain host)

Note: The administrator that gets the verification record needs to complete the verification process. The verification records are unique to each administrator, so one administrator cannot finish a domain verification that was started by another.

Step 1: Get your unique verification record

If you already signed up for G Suite but didn't complete the setup process, you can pick up where you left off.

Sign in to your Google Admin console: https://support.google.com/a/answer/182076

Sign in using your administrator account (does not end in @gmail.com).

Open the setup tool and click Verify. https://admin.google.com/u/0/ac/signup/setup/v2/welcome

Click Continue to verify your domain with a TXT record. You can also click Switch verification method if you need to use another method.

A red circle highlights the Continue button at the bottom of the Here

Click Copy to copy your unique verification record.

A red circle highlights the Copy button next to the TXT verification record.

Step 2. Go to your domain's DNS records

In a second browser window or tab, sign in to your domain host account. For details, see Identify your domain host.
Go to your domain's DNS records. The page might be called something like DNS Management, Name Server Management, Control Panel, or Advanced Settings.

Select the option to add a new record on DNS settings.

Step 3. Add the verification record to your domain host

For the record type, select TXT.
In the Name/Host/Alias field, enter @ or leave it blank.
Your host might require you to enter your domain, which looks like example.com, into this field.
Your other DNS records might indicate what you should enter.
In the Time to Live (TTL) field, enter 86400 or leave the default.
In the Value/Answer/Destination field, paste the verification record you copied in step 1.
Save the record.

Note: If you see a warning message about changing your DNS settings, disregard it. Adding the TXT record won't damage your website or DNS settings.

Step 4: Tell Google to verify

Return to the setup tool in the Admin console and click Verify.

A red circle highlights the "Activate" option in the domain verification section.

Click Continue, then scroll to the bottom of the next page. Click Verify my domain.

A red circle highlights the Verify My Domain button on Step 5. Add your TXT Record page of the wizard

---------------------------------------------------------------------------------------------------------------------------------------------------

Domain verification using CNAME record:

https://en.wikipedia.org/wiki/CNAME_record

https://cloud.google.com/identity/docs/add-cname

When setting up Cloud Identity, you might need to add a CNAME record to your domain's DNS settings to verify domain ownership. You add CNAME records using the administration tools at your domain host, not the Google Admin console. The exact steps for your host might vary. Below you can find generic steps that apply for any host as well as specific instructions for several popular hosts.

https://support.google.com/cloudidentity/answer/112037

Adding a CNAME record does not affect other services.
Add a CNAME record (host-specific steps)

Before following our generic steps, see if you can find specific steps for your domain host: https://support.google.com/a/topic/1615038

Add a CNAME record (generic steps)

Copy the CNAME record from the Cloud Identity Setup Wizard.
Sign in to your domain's account at your domain host. Who is my domain host?
Locate the page for updating your domain's DNS records.

The page might be called something like DNS Management, Name Server Management, or Advanced Settings.
Locate the CNAME records for your domain. You may already have one or more records resembling:

Name / Host / Alias Time to Live (TTL) Record Type Value / Answer / Destination
www 86400 CNAME yourdomain.com. or @
mail 86400 CNAME yourdomain.com. or @

Add the CNAME record you copied from the Cloud Identity Setup Wizard.
Save your changes and wait until they take effect.

For more detailed instructions, see Add a CNAME record to your domain's DNS records in the G Suite Admin Help Center: https://support.google.com/a/answer/47283.

CNAME record changes can take up to 72 hours to go into effect, but typically they happen much sooner.

Need help or want to verify your change? To begin, see Troubleshoot CNAME records: https://support.google.com/cloudidentity/answer/93595. If you still need help after that, or if you can't access your domain's DNS records, contact your domain host directly for assistance.