You cannot change SMTP addresses for distribution groups by using EAC in an Exchange Server 2013 environment
When you try to add or remove SMTP addresses for distribution groups by using Exchange Admin Center (EAC) in a Microsoft Exchange Server 2013 environment, you receive the following error message:
Conversion from Microsoft.Exchange.Management.ControlPanel.EmailAddressItem to Microsoft.Exchange.Data.ProxyAddress has not been implemented.
This issue occurs because Windows PowerShell cannot identify the EmailAddressItem type.
To resolve this issue, install the following cumulative update:
2892464 Description of Cumulative Update 3 for Exchange Server 2013
To work around this issue, connect Windows PowerShell to the Exchange Online service, and then use the Set-DistributionGroup cmdlet to add or remove SMTP addresses.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about how to use Windows PowerShell in Exchange Online, go to the following Microsoft website:Set-DistributionGroup cmdlet, go to the following Microsoft website:
Article ID: 2902936 - Last Review: 11/25/2013 23:53:00 - Revision: 3.0
Microsoft Exchange Server 2013 Enterprise, Microsoft Exchange Server 2013 Standard
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