Hello,
We are merging with another company and both companies are on Office 365. We need to consolidate(merge) these companies together and have a single email domain but still allow old email domain to deliver mail to the users in each domain.
I know we can add additional SMTP addresses to the users accounts but how do we merge and continue to receive mail on all three domains(2 old ones and one new one)
Company A: companyA.com
Company B: companyB.com
New company, Company C: Users should receive email to companyC.com and to either companyA.com and companyB.com if they belong to that original company.
One company is using ADFS and the other one is not. How would authentication occur?
Thank you.