If you are running into a weird integrated security authentication behavior... this is your fix.
This will fix your HTTP 401.1 - Unauthorized: Logon Failed issue for Reporting Services or CRM.
This issue occurs if you install Microsoft Windows XP Service Pack 2 (SP2) or Microsoft Windows Server 2003 Service Pack 1 (SP1).Windows XP SP2 and Windows Server 2003 SP1 include a loopback check security feature that is designed to help prevent reflection attacks on your computer. Therefore, authentication fails if the FQDN or the custom host header that you use does not match the local computer name.
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1. |
Click Start, click Run, type regedit, and then click OK. |
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2. |
In Registry Editor, locate and then click the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa |
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3. |
Right-click Lsa, point to New, and then click DWORD Value. |
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4. |
Type DisableLoopbackCheck, and then press ENTER. |
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5. |
Right-click DisableLoopbackCheck, and then click Modify. |
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6. |
In the Value data box, type 1, and then click OK. |
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7. |
Quit Registry Editor, and then restart your computer. |
http://support.microsoft.com/default.aspx?scid=kb;en-us;896861
As Always Give a shout out if this helped you fiix your issue.
Pete Orologas