Custom domain migration problem

Hi,
I am trying to migrate custom domain. I am very suprised that docs didnot help me a bit. I am using Lock and MFA features. I am very confused on where to change? I added “configurationBaseUrl” into lock constructor, thats it. Then what?

Hey there!

Have you had a chance to check out our general docs on using custom domains with Auth0?

I did actually, but I couldnot understand the steps for migration. I have no idea how to change my previous xxxxxx.us.auth0.com, no setting is related under application or tenant settings. My custom domain is working when I access from email links, but I cannot make it default domain for authentication process and MFA page.