Access Mail and Nextcloud by subdomain

Hi, I’m a new user to Mailinabox. I just setup my Server and have a question:

The links to access Mail and Nextcloud are:

Is it possible to access it by a subdomain like:
webmail . domain . com
cloud . domain . com
(Spaces between dots because new users can only post 2 links)

It is amazing what a search will turn up:

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Thank you for your help. I searched before but didn’t find.