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ridfahri-04's avatar
ridfahri-04
Copper Contributor
Dec 07, 2018
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Add subdomain to existing federated domain with Exhange Hybrid configured

Hi All,   Our Office 365 is consists of one federated domain: company.com. Our onpremise AD domain consists only single-forest single-domain: company.com. But our Exchange 2010 onpremise environmen...
  • VasilMichev's avatar
    VasilMichev
    Dec 10, 2018

    That seems like another stupid limitation of the "add domain" wizard, just use PowerShell (New-MsolDomain). Although I just tested it in one of my test tenants and I was able to add a subdomain to a federated domain just fine via the portal. So perhaps it's something specific to your setup. Anyway, just use PowerShell:

     

    New-MsolDomain -Name sub2.domain.com -Authentication federated

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