said by Comcast Chat transcript :

Problem : I can not access email for my secondary accounts "user-one" and "user-two". The personal web space is not visible via http, but I do still have ftp access.
Royce > I can not access email for my secondary accounts "user-one" and "user-two". The personal web space is not visible via http, but I do still have ftp access.
Oksana > Hello Royce, Thank you for contacting Comcast Live Chat Support. My name is Oksana. Please give me one moment to review your information.
Oksana > How can I assist you today?
Royce > I would like to have the problems with my secondary accounts fixed.
Oksana > I will be happy to assist you with that
Oksana > Please describe the issue and any error messages that you are receiving
Oksana > May I ask you to provide me with the full account number? This process allows us to ensure that your privacy is protected. The account number can be found on the copy of your monthly comcast bill.
Royce > I can not access either of those accounts via webmail or POP3. The personal web space does not show up via a web browser, but I do still have ftp access to both of the personal web sites. If I attempt to manage the secondary accounts, it says that I do not have any secondary accounts. If I try to recreate them, it says that they already exist.
Oksana > I will be happy to assist you with that
Oksana > May I also ask you to provide me with the full account number and the amount of your last payment. This process allows us to insure that your privacy is protected.
Royce > The account number is 12345 234567-12
Oksana > Thank you. Usernames "user-one" and "user-two" are not active. I will reactivate them for you
Oksana > I have reactivated it. You should be able to access your email now
Oksana > Did it work?
Royce > Yes, the web sites are now visible again. Thank you very much. Any idea why they were deactivated?
Oksana > You are welcome. It can happen if you delete them with the primary user access yourself, or when the services change on the account. It can also be a system error. I don't have the exact reason available to me
Oksana > Do you have any other questions I can assist you with at this time Royce?
Royce > OK, well thank you reactivating them for me. Good bye.
Oksana > Have a good evening
Oksana > Thank you for contacting Comcast. If you need additional assistance you can also find product support and account information on our Web site at »help.comcast.net. Comcast also has a technical support available 24/7 both in chat as well as by phone at 1800comcast.
Oksana > Analyst has closed chat and left the room

said by jbob :

I would like to ask though, did you try and access those secondary accounts via your primary account? I was wondering since the CSR said they had been deactivated and you might have been able to see that and reactivate them via your Primary account. Just curious.