I have two Unlicensed Microsoft 265 active users in my account and I want them to be able to use his email address to receive/send email messages, is this possible without having to pay for an Office 365 premium license for them...?
Yes, this is possible. You can do it in a couple of ways depending if you want to keep those active users in place.
#1 1. Assign licence to unlicensed users 2. Convert mailboxes to shared mailboxes in Exchange Admin Centre 3. Add permissions of those you want to send as/full access to the mailboxes 4. Now they are shared mailboxes remove the licences and they will just be shared mailboxes and you don’t have to pay for them
#2 1. Remove the active users in the 365 admin panel 2. Add 2 shared mailboxes with those addresses in Exchange Admin Centre 3. Add permissions of those you want to send as/full access to the mailbox
Both ways require the addresses to be on shared mailboxes to do what you need and not have to pay for it!