Removal of Authoratative Domain in Hybrid environment

Question

Hello, i have a client who setup Exchange 2013 hybrid, all users have been migrated to the cloud, but one specific domain is now on their own tenant. This domain was authoratative but now is set to external relay.

When we try delete the domain (domain2.com) from accepted domains, we get an error "domain is federated and connect be removed, please use Remove-FederatedDomain..."

So, my question is, can I remove it without using the hybrid wizard? and is removing it without the hybrid wizard supported?

If re-running the hybrid wizard is required, is there any way to know what settings they configured when they set up the hybrid, as this was something they inherited internally, and we would not want to mess up their current settings.

Thanks.

Please see snippet from get-hybridconfiguration

ClientAccessServers : {}
EdgeTransportServers : {}
ReceivingTransportServers : {SRV1, SRV2}
SendingTransportServers : {SRV2, SRV2}
OnPremisesSmartHost : domain1.com
Domains : {domain1.com, domain2.com}
Features : {FreeBusy, MoveMailbox, Mailtips, MessageTracking, OwaRedirection, OnlineArchive,
SecureMail, CentralizedTransport, Photos}
TlsCertificateName : <I>CN=Go Daddy Secure Certificate Authority - G2, OU=http://certs.godaddy.com/repository/,
O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US<S>CN=webmail.domain1.com,
OU=Domain Control Validated

Answer 1

@Raymond Brooks

You could use the Set-HybridConfiguration command to set a new value this one:

Set-HybridConfiguration -Domains  domain1.com  

You can also rerun HCW to uncheck this domain: for more detailed information, you could have a look about this article.
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

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Answer 2

Did you check this article - https://learn.microsoft.com/en-us/exchange/troubleshoot/administration/1007-access-denied-delete-federation-trust

Answer 3

Thank you both, i will look into these options