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in SharePoint Server by 64 69 85

I have set up my new SharePoint 2019 environment and created a site collection and web application. But as soon as I join in, a popup appears asking for my credentials and it keeps asking, as shown in the following image:

DisableLoopbackCheck  - Unauthorized credentials


  • I'm sure I entered the right credentials.
  • Trying to login by the Farm Account, and site collection administrator. 

1 Answer

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You can Solve this issue by adding the DisableLoopbackCheck in the registry.

How to Add DisableLoopbackCheck in the registry?

  1. Click Start, click Run, type regedit or press (windows + R) write
    regedit, then click OK.
  2. In Registry Editor go to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
  3. Right-click Lsa, point to New, and then click DWORD (32-bit) Value.
  4. Name the key DisableLoopbackCheck
  5. Double click DisableLoopbackCheck Key, in Value date: box type 1.
  6. Click OK, and close Registry Editor
  7. Restart IIS in the CMD, by write iisreset command.


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