Hi there,

We are trying to federate a second domain under a single ADFS server. We are running ADFS 2.0 with Update 2 installed. When we go to issue a Update-MsolFederatedDomain DomainName <domain> SupportMultipleDomain we get the following error :

Update-MsolFederatedDomain : The switch parameter SupportMultipleDomain is not
supported here.
At line:1 char:27
+ Update-MsolFederatedDomain <<<<  -DomainName "tundraoilandgas.com" -SupportMu
ltipledomain
    + CategoryInfo          : InvalidOperation: (:) [Update-MsolFederatedDomai
   n], FederationException
    + FullyQualifiedErrorId : MultipleDomainSwitchNotSupported,Microsoft.Onlin
   e.Identity.Federation.Powershell.UpdateFederatedDomainCommand

Does anyone know what may be causing this problem?

Thanks,

Kevin

What you need is to delete the trust relationship in the ADFS console and you are able to start from scratch.
This time remember to use the -Supportmultipledomain parameter on all the domains you want to federate.

So remember to change it on "main" domain (federated):

Update-MsolFederatedDomain -DomainName <domain1_fqdn> -SupportMultipleDomain
Successfully updated '<domain1_fqdn>' domain.

Before you go with:

Convert-MsolDomainToFederated -DomainName <domain2_fqdn> -SupportMultipleDomain

Please find more here:

SupportMultipleDomain switch, when managing SSO to Office 3

Thanks for your reply, I had previously deleted the trust however I either didn't wait long enough before trying the CMD-LET again or restarting the ADFS services after deleting the trust and re-opening powershell seemed to allow me to use the Multiple domain switch. Thanks again !