HCW Federation failed with Error RRS feed

  • Question

  • We are planning to configure Exchange Hybrid Configuration with Exchange 2010 SP3 server. We have AD domain '' and SMTP domains ',," on Exchange 2010 server ( single server using mimecast as email gateway).

    We ran AAD connect for "" to migrate users with "" email addresses.

    When we ran HCW from windows 2012 r2 server ( could not run HCW on Exchange 2010 server), the federation part failed with the below error message:

    PowerShell failed to invoke 'New-FederationTrust': Unable to access the Federation Metadata document from the federation partner. Detailed information: "The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel."

    we have SSL certificate for "" and Autodiscover service internaluri is

    Any help to resolve this issue is much appreciated.


    Sunday, June 23, 2019 1:23 AM