Cannot Bring Existing Domain due to semicolon in Comcast-required CNAME

Hello IBEW446,

Welcome to the forum.

The community would like to the help, but can you clarify a few items for us?

1. Who is your current host for the domain?

2. Where do you get the 'error/failure' on the verification.

 - On your current host or on Comcast My Account?

3. What is the Internet browser are you using?

Thank you

I have the same problem, Comcast is asking me to set up "KU,UK"as a cname, but my domain manager wont accept commas in the cname.  domain is "battelshardware.com"

I had the same issue today, except with an apostrophe. I'm stuck on step 5 of this process http://businesshelp.comcast.com/help-and-support/email/using-own-domain-business-class-email-web-hosting/

I spent 10 hour today trying to reach a "Tier 2" support person to no avail. 

Strangely, my domain populated with DNS entries. However, I can't assign mailboxes using that domain because it's un-verified.

I'm struggling with the same issue, but receiving @@ at Source CNAME.  Did anyone receive an answer or procedure to fix the issue?