For some strange reason we cannot use the EmailAddressPolicyTemplate %1g%s@contoso.com (jsmith@contoso.com) for a particular emaildomein on our Exchange 2013 server. If we create the address policy and apply it, it gives us the error:

"Failed to generate proxy address. Additional information: General Error."

The strange thing is, that any other domain works correctly with %1g%s@. Any other format for domain contoso.com works like it should.

Our environment has a forest trust with AD domain Contoso.com for a upcoming crossforest migration.

I already recreated the accepted domain (internal-relay) and the send connector for this domain.

Because of this error, the cross forest mailbox moverequests fail at finalizing, that they cannot update the mailbox in the target environment.

If we set the EmailAddressPolicyEnabled to $false, the moverequest completes, but the mailbox is not updated to the correct mail address. I tried to find extra logging for what is happening but can't find any options.

Last lines of the moverequest report:

5/7/2015 10:42:53 AM [DSMxxxx] Target mail user 'Testuser12' was loaded
from domain controller 'DSMxxxx.Constoso.com.
5/7/2015 10:42:53 AM [DSMxxxx] Fatal error
UpdateMovedMailboxPermanentException has occurred.

Why is only policy %1g%s@contoso.com not working?

%2g%s@contoso.com works

%1g%s@MSFTraders.com works

Help would be appreciated.

• Edited by Messaging Consultant Thursday, May 07, 2015 1:33 PM

Hi,

Lets see how can we check possible options:

*have you rebooted the server

*Tried changing the domain to Authoritative or maybe test with some dummy.com internalrelay email address policy.

*

How many Email Address Policies do you have in each environment.

Do you have %2g%s@contoso.com in the source forest Policy if not.

They try this:

1. Create a email policy (don't apply) %3g%s@contoso.com on Source forest and wait sometime

2. Try creating the same %3g%s@contoso.com policy in the target forest and check if works.

If you have any conflicting policy remove them using below cmdlets:

Get-EmailAddressPolicy

Remove-EmailAddressPolicy -Identity "South East Offices"

Hi Consultant,

Is there any update on this thread?

Base on my search, it may be caused by duplicate email address proxy.

I also found a similar thread for your reference:

Failed to generate proxy address in Exchange 2013

Best regards,