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Are you running Hybrid?<br><br>
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no. just a single domain on office 365 which used to be on prem, and 3 or 4 domains still on the on prem exchange 2016 server,<br />
<br />
thanks
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nigelbeatson

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ok thanks, but how / where is the policy located in ecp?
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many thanks, i found it and as you said thd problem is resolved.<br />
<br />
regards<br />
nigel
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Under Mail Flow | Email address Policies. Each of your accepted domains should have an address policy or be referenced on an address policy. Depends on how you setup users (one email address or multiple.). If you have only one. Click on it and on the right side, it will show you all email addresses it configures. If you have multiple ones, you can just click each until you see the domain you want to remove.&nbsp;
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<div class="content wysiwyg-content">
we have a single exchange 2016 server which we installed with a single accepted domain initially. <br />
<br />
we added 4 additional domains and all worked well.<br />
<br />
for a number of reasons we have moved our primary (initial) domain to the cloud running office 365.<br />
<br />
we now have a problem sending from one of the remaining domains to the relocated cloud domain, where it is saying the email address cannot be found.<br />
<br />
i am assuming that email sent from our local on prem domain is still trying to be delivered to the on prem exchange server.<br />
<br />
i wanted to remove the domain in question from the accepted domains listed on our in prem ecp. <br />
<br />
however, when i try to do this i am told :-<br />
<br />
cant remove the domain domain.com because it its referenced in an email address policy by the proxy address template ‘smtp:%g.%s@domain.com’<br />
<br />
can anyone advise how we go about clearing the old domain name from our local exchange server so mail can flow from our remaining domains to the one relocated into the cloud ie domain.com<br />
<br />
any advice much appreciated.<br />
<br />
regards<br />
nigel
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</div>


we have a single exchange 2016 server which we installed with a single accepted domain initially. 

we added 4 additional domains and all worked well.

for a number of reasons we have moved our primary (initial) domain to the cloud running office 365.

we now have a problem sending from one of the remaining domains to the relocated cloud domain, where it is saying the email address cannot be found.

i am assuming that email sent from our local on prem domain is still trying to be delivered to the on prem exchange server.

i wanted to remove the domain in question from the accepted domains listed on our in prem ecp. 

however, when i try to do this i am told :-

cant remove the domain domain.com because it its referenced in an email address policy by the proxy address template ‘smtp:%g.%s@domain.com’

can anyone advise how we go about clearing the old domain name from our local exchange server so mail can flow from our remaining domains to the one relocated into the cloud ie domain.com

any advice much appreciated.

regards
nigel

relocating / clearing default domain from an on prem exchange 2016 server

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.