DNS record in Squarespace

Adding CNAME record for a domain with subdomain

1. In this case your custom domain will look like calendar.yourbusiness.com

2. Log in to your Squarespace dashboard

3. Go to Domains and select your domain

4. Go to DNS -> DNS Settings

5. Click on ADD RECORD under the Custom records section

6. Select CNAME as the Type

7. Add Host and Data

8. Click Save button

9. For more information refer official documentation

Adding ALIAS record for a root domain

1. In this case your custom domain will look like yourbusiness.com

2. Follow the same steps mentioned above except selecting the record type

3. Select ALIAS as the Type

4. You may have to disable DNS Security Extensions to add the ALIAS record. Read for more info