"Recipient address not valid" regedit


  • I am wondering if anyone nows how to turn off the following MailTip with a registry setting. I would like to turn off "Recipient address not valid" it is located under Undeliverable Message MailTips. The reason being is we have users within our organization that do not have email addresses but are part of a location group.

    Thank You in advance for any help on this.


    Monday, December 30, 2013 5:56 PM


All replies

  • Hi Troy,

    Do you want to configure organizational settings for "Recipient address not valid" MailTip?

    As far as I know, there is no such registry setting to control the "Recipient address not valid" MailTip. We can only disable the MailTip feature to achieve this goal. See:

    Configure Organizational Settings for MailTips:

    In addition, you can also post in Exchange forum to get further assistance:


    Steve Fan
    TechNet Community Support

    Wednesday, January 01, 2014 3:32 PM
  • You can update the MailTips InvalidRecipient configuration property with EWS by accessing the UserConfiguration Properties of the Inbox associated with each account store. To make this Organization wide - you could just iterate through using Get-Mailbox. Outlook receives the update when it does it's next Exchange sync which happens fairly quickly. 

    $ewsdll = "C:\Program Files\Microsoft\Exchange\Web Services\2.0\Microsoft.Exchange.WebServices.dll"
    $ews = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService([Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010)
    $ews.Url = ""
    $psCred = Get-Credential  
    $creds = New-Object System.Net.NetworkCredential($psCred.UserName.ToString(),$psCred.GetNetworkCredential().password.ToString())  
    $ews.Credentials = $creds     
    $folder = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($ews,[Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Inbox)				
    $config = [Microsoft.Exchange.WebServices.Data.UserConfiguration]::Bind($ews, "MailTips", $folder.Id, [Microsoft.Exchange.WebServices.Data.UserConfigurationProperties]::All)
    $config.Dictionary["DisabledMailTips"] = "InvalidRecipient " # last space is important here   (set to $null to re-enable)     

    • Edited by SliverNinjas Wednesday, December 10, 2014 6:34 PM
    • Proposed as answer by SliverNinjas Wednesday, December 10, 2014 6:34 PM
    Wednesday, December 10, 2014 6:32 PM