We have a FIM 2010 R2 sp1 environment setup which works. We need to publish the user portal using a different URL than the server names. However, I have gone through all of the steps to create the alternate access mapping including the SPNs and delegations. We are currently forcing Kerberos for the portal and it works on both servers which host it using their servernames. The issue is when users go to the new URL the authentication box appears for them three times then just a blank page is displayed. Since I have verified that the SPNs and delegations are setup just as they are for the actual server names and I have added the AAM in the Sharepoint admin portal I'm not sure why it is doing this. Any help would be greatly appreciated.
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