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Trying to setup ADFS with AD Connect. I get an error message when trying to add the ADFS service account. The error states that there is already an existing service account in the directory with the ADFS service Service Principal Name (SPN).

I ran setspn -xfound 0 groups of duplicate SPNs.

What else can cause this error message?

Running Server 2012R2

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You could check the existing ADFS service SPN by setspn -q host/<adfs farm name>, For example setspn -q host/fs.contoso.com

  • Is my reply helpful? – Nancy Xiong Jul 4 '18 at 4:11

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