RE: Sharing a domain with two companys

Hi Måns,

To better understand your concern, I would like to collect the following information:
1. What goal do you want to achieve in Office 365? If possible, please provide us an example to let us better understand your requirement.
2. A domain can only be verified in one Office 365 tenant. I notice this sentence “We are sharing a domain with another company”. Will the other company also use Office 365 later or use other mail services?

With the detailed information, we will do further research for you. Your time and efforts will be appreciated.

Thanks,
Richard