"HCW8039 The hybrid Send connector must only contain the single address space" error when you run Hybrid Configuration wizard

Applies to: Exchange OnlineExchange Server 2013 EnterpriseExchange Server 2013 Standard Edition

PROBLEM


When you run the Hybrid Configuration wizard, you receive the following error message:
HCW8039 The hybrid Send connector must only contain the single address space '{0}

CAUSE


This issue occurs if the Send connector that's created by the Hybrid Configuration wizard has additional namespaces added to it.

SOLUTION


To resolve this issue, follow these steps:
  1. Open the Exchange Management Shell.
  2. Run the following command:
    Get-SendConnector -name "Outbound to Office 365"  
  3. In the output, examine the value of the AddressSpace parameter. You should see either "*" or "contoso.mail.onmicrosoft.com;1."
  4. If you see any addresses other than "*" or "contoso.mail.onmicrosoft.com;1," remove them. To do this, run the following command:
    Set-SendConnector -name "Outbound to Office 365 "smtp:contoso.mail.onmicrosoft.com;1"  
  5. Run the Hybrid Configuration wizard again.

MORE INFORMATION


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