You'd have to bring one tenant on-premises. You can't have a domain registered to multiple tenants in O365.
From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On Behalf Of Paul Cookman Sent: Thursday, May 4, 2017 7:10 AM To: exchange@lists.myitforum.com Subject: [Exchange] Re: Intergrate two 365 Tenants So is it possible to have two separate tenants works as one domain name that you know of, or do I need to bring one tenant down on premise to make it possible? ________________________________ From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> <listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com>> on behalf of Michael B. Smith <mich...@smithcons.com<mailto:mich...@smithcons.com>> Sent: 04 May 2017 05:13 To: exchange@lists.myitforum.com<mailto:exchange@lists.myitforum.com> Subject: [Exchange] RE: Intergrate two 365 Tenants Only with contacts. They implemented it differently than they did in Mercury. From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> [mailto:listsad...@lists.myitforum.com] On Behalf Of Paul Cookman Sent: Wednesday, May 3, 2017 3:05 PM To: exchange@lists.myitforum.com<mailto:exchange@lists.myitforum.com> Subject: [Exchange] Intergrate two 365 Tenants Is it possable to have two tennants send from one domain name? (merger) On prem I know you could update your SPF for the other side, send out as chosen domain name and on the receiving side create contacts and a send connector to get the emails to go across. In 365 I know you cant create a reply address for another domain name that is already in use by 365. I guess this would also be the same issue with free busy using the MFG. Regards, Paul.
