In this case, your custom domain will look like
https://yourbusiness.com
.Log in to your Microsoft 365 admin center.
Click on Settings > Domains.
Choose your domain.
Go to the DNS records tab.
Click on the + Add record button.
Select A (Address) as the Type.
Fill in the Host name or Alias, IP address, and TTL fields as seen on the custom domain setting page on NeetoCal.
Click on the Save button.