Exchange – Can’t remove the domain ‘xy.com’ because it’s referenced in an email address policy by the proxy address template ‘smtp:@xy.com’.

The current company im working for is a large (for Aus) media company and as such, because basically everyone that works here is into marketing and sales, we just have a ridiculous number of domains.

As part of the cleanup process here – i bought up the huge number of domains we had and that maybe some of them weren’t current – and got back confirmation that many weren’t (approx 120)

The first job was removing them from exchange accepted domains, but i kept getting an error

Can’t remove the domain ‘xy.com’ because it’s referenced in an email address policy by the proxy address template ‘smtp:@xy.com’.

Even though the domains were not anywhere in the existing email address policies.

As usual, ADSIEdit to the rescue

navigate to

CN=Recipient Policies,CN=<Your Org Name>,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=xy,DC=com

Find the recipient policy which contains an attribute called “disabledGatewayProxy”

Remove each of the domain values from that attribute

Wait a few minutes for replication

then go back to exchange and remove the accepted domain.

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