Offic365 - Multiple Domains - Single Tenant

[MYK-IT]

Hi,

 

We have a single Office365 Tenant with additional (sub)domains registered.

 

The intention is is have, and use different (sub)domains for different user types (e.g. staff, students, governors etc.)

 

I have created accounts for a sub-domain, as well as creating (and assigning) Global Address List, Offline Address Book, Resources & Contact lists specifically for that sub-domain; and applying associated Mail Box Policy.

 

This is working all fine.

 

However, how can I configure Office365, so that the sub-domain does not (or cannot) access resources (e.g. calendar etc) from other sub-domains, or even parent domain?

 

Hope this makes sense. I didn't want to start using multi-tenancies.

 

Thanks,