Managing email for clients that run multiple businesses

Managing email for clients that run multiple businesses

Hello,

I am a web developer who manages email for multiple clients, and some of those clients run multiple separate businesses. I have two general questions:

1. If my client wants me to manage their email accounts on their behalf, is it compulsory for me to have a paid account in addition to the actual email accounts used by my client?

What I mean is that as an administrator I don't require a Zoho-hosted email address or inbox for the admin account. I just need to be able to login and create /manage the email accounts that my client will use, which will be paid accounts. But if my client needs 5 email accounts it seems that my admin account is extra on top of this. So either they end up having to pay for 6 accounts (one admin account and 5 email user accounts) or else one my client's 5 accounts has to be an admin account and I have to log in as them, which is not so great for my client's privacy because it means I can read the email for that account.

Is there a solution where I can be an admin for a client without having a paid email account?

2. I believe you enforce a "one phone number - one account" policy. But I have clients that run several separate businesses with separate domains. They only have one phone number but want to be able to have multiple independent paid accounts with independent domains and independent domain email addresses. I know that one account can have multiple domains but does this really result in full independence of the domains, the same as would be the case if they had separate accounts for each domain?

I've heard reports of things like contacts being shared across the domains, which is not what my clients want. When logged in as an email user of one domain there should be no indication whatsoever that there are additional domains also within the account. As paying customers it seems that they should be entitled to this. Is there a solution so that one phone number can be used for multiple independent paid accounts?

Thanks.