AIF WebService SPN 401(target principal name is incorrect)

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Hi Pros,

I am facing an authentification issue with AIF WebService. Calling the WebService method it replies with "401 unauthorized the target principal name is incorrect".

We have multiple IIS Servers in our domain, hostng the WebServices of different AOS. Some of them are running under the same AppPool User.(domain user)

I wonder if it has something to do with the SPN and tried to understand SPN settings by using "setspn -l myDomain\myAppPoolUser" but I do not know how the SPN settings should look like...

Does anybody know if it is possible to run different IIS hosting different WebServices under the same AppPoolUser?

How should the correct SPN Settings look like?

Any useful articles?

Thanks in advance for your ideas!

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