Dealing with a Missing Microsoft Exchange Server Auth Certificate that Causes “Federation or Auth certificate not found” Warnings

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3 Responses

  1. Top says:

    Perfect thanks a lot for this !!!
    I had this warning after renewing a certificate and deleting the old one.

  2. Ralph says:

    Hi, I am unable to connect to Exchange PowerShell because I deleted the certificate by mistake. Any idea?

  3. Zubair Alexander says:

    Hi Ralph, are you unable to start the Exchange Management Shell (EMC) at all, even as an Administrator? If that’s the case you can use the 64-bit PowerShell ISE or the 64-bit PowerShell. Just make sure that you start the shell as an Administrator.

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