Forum Discussion

Copper Contributor

Feb 11, 2018

One account 3 Companies

Hello all. We are migrating to Office 365 from 2 seperate, hosted exchanges. The set up is 1 Holding company with 4 employees who work accross all companies and require to be able t...

fasttrack

office 365

VasilMichev

MVP

Feb 12, 2018

If those are separate Office 365 tenants and/or external organizations, then the answer is no, not possible - you have to use separate accounts.

Stephen Wall

Copper Contributor

Feb 12, 2018

Thanks for the response.
I am trying to achieve this by using one tenant with multiple domains and aliases.

Victor_Ivanidze
Bronze Contributor
Mar 12, 2018
Have a look at ChooseFrom 365 cloud service.
VasilMichev
MVP
Feb 12, 2018
If all domains are in the same tenant, you can add as many aliases from as many domains as you want to your users (the limits are in the hundreds). Sending from a different alias is tricker though, as Exchange by default will only allow you to send via the Primary SMTP address. There are certain workarounds for this, such as using a "dummy" Outlook profile, or provisioning the alias to another object (DG, shared mailbox) and granting the user Send As permissions. To ensure email deliver, you then have to also configure some form of forwarding from the DG/shared mailbox to the user's mailbox.