We can’t change
our custom domain name, or reverse its deployment, once deployed. If we
have a special need to change it, we have to contact Salesforce Customer
Support.
After we deploy our domain, it’s activated immediately
and requests with the original URL are redirected to our new domain.
Only Salesforce Customer Support can disable or change our domain name
after it’s deployed.
My Domain is required before we can use these Salesforce features:
1. Single sign-on (SSO) with external identity providers
2. Social sign-on with authentication providers, such as Google and Facebook
3. Lightning components in Lightning component tabs, Lightning Pages, the Lightning App Builder, or standalone apps
Can we have multiple domains?
We
can have multiple domains and custom URLs only for Force.com Site,
Site.com and Communities but not for logging into Salesforce.
Currently
only one My Domain is allowed per organization. Multiple custom domains
are possible by CNAME’ing a Force.com Site to each specific custom
domain.
Can we have alias for domains?
Alias are possible by CNAME’ing a Force.com Site to each specific custom domain. It is not supported for Salesforce login.
Cheers!!!