How do I access user e-mails through webmail?

How do I access user e-mails through webmail?

Hi Zoho

I've just signed up top Zoho, and am awaiting the sorting-out of the MX records.  I realise that there are a few pieces that need to be put into place yet; but I thought I'd ask this anyway.  I am able to access the inbox for the main admin user on my account through Zoho webmail (and can of course send e-mails, because the MX records don't affect that); but how will I be able to access the inboxes of the two other users I have set up?  Will I have to do that through an e-mail client rather than webmail?

Regards,
bevanjones