What is a CNAME
CNAME stands for Canonical Name, it’s a record that helps attach other domains or subdomains to an already existing domain.
Usually important when mapping several services that are running on a server on different ports to the domain name.
Example
ftp.truehost.cloud (name/service)
truhost.cloud(domain/ canonical name)
Changing on Truehost Portal.
Login to truehost client area.
Go Domains
Then my domains
Against the domain that you need to add A record
Click the manage Domain option
Then DNS Management
A table that require details will appear fill it as example below
Host name (WWWW)
Record type (CNAME (Alias))
Address (schools.truehost.cloud (canonical url - cname))
Priority (N/A)