Enterprise Datastore Configuration Error: <authentication mode="Windows" />

[JoelKyereNNimarko]

I am configuring Datastore for my deployment and I am facing an unfamiliar error.........(

 <authentication mode="Windows" />

An image of the error is attached to this post.
Any assistance please? 

[HenryLindemann]

Hi @JoelKyereNNimarko, in IIS your IWA Integrated windows authentication is turned on on the arcgis webadaptor  this should just be turned on for portal webadpator if you just have the one you should install another one as this is best practice currently.

go to the webadpator in iis click on authentication and turn on anonymous authentication and turn off windows authentication 

Hope it helps

Regards Henry