Forum Discussion
Custom Domain for O365 Groups in a Federated Hybrid Environment
So, I'm trying to wrap my head around my current problem and could use a little help. What we have: Office 365 with a verified custom domain (e.g. contoso.com) Exchange 2013 onPrem also the M...
I would log a call with Microsoft support and get some help to work through this scenario. It is definitely supported to have Office 365 groups synchronized back to an on-premises AD using the latest version of AADconnect. The multi-domain article you reference has nothing to do with hybrid interoperability.
Will contact support (or CSP in our case).
I have them synced back onPrem, that's working "fine".
What I'm unsure about, are Steps 2 and 3 for Groups Hybrid setup. What are they even for?
- why do I need to add a subdomain of my already verified vanity domain
- and how do I do it via PowerShell?
- what are the public DNS (MX and CNAME) for the this subdomain for?
- it's not like those groups suddenly have new email addresses like groupname@groups.contoso.com
- or is that how it supposed to work and I'm not supposed to use groupname@contoso.com?