Home > Uncategorized > SharePoint 2010 Alternate Access Mappings Cannot login error

SharePoint 2010 Alternate Access Mappings Cannot login error

I was configuring SharePoint 2010 on a customer’s production server using the alternate access mapping to map the customer’s domain to the SharePoint web application and I was able to log on to the SharePoint web application from my office and surprised that I cannot log on to the same application from inside the customer’s company (notice that the customer’s domain name is the same domain controller name), after googling the problem I found that it was a IIS7 related to Windows Server 2008 R2 issue.

Here is the steps to solve that,

  • Start Registry Editor (Regedt32.exe).
  • Locate and click the following key in the registry:
  • HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters
  • On the Edit menu, click Add Value, and then add the following registry value:
    • Value name: DisableStrictNameChecking
    • Data type: REG_DWORD
    • Radix: Decimal
    • Value: 1
  • In Registry Editor, locate and then click the following registry key:
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa o Right-click Lsa, point
      to New, and then click DWORD Value.
    • Type DisableLoopbackCheck, and then press ENTER. o Right-click DisableLoopbackCheck,
      and then click Modify.
    • o In the Value data box, type 1, and then click OK
  • Restart the server
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Categories: Uncategorized
  1. Michael
    February 14, 2011 at 7:13 pm

    This was really helpful!
    My case: Login from a client was always possible without dialog, but not on the server (both intranet). What was confusing for me: The login on Windows Server 2008 always failed even with correct credentials.

    Thank you for your posting!

  2. February 15, 2011 at 6:25 am

    I have the same problem I cannot login from the SharePoint server itself.
    My configuration is only one access mapping set to default as sharepoint.domain.com it is available for access intranet and internet.
    The only machine that can’t access it is the server itself!

  3. August 8, 2011 at 1:23 pm

    Thanks. This helped !

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