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Showing posts from March, 2012

Unable to start debugging on the Web server. An authentication error occurred while communicating with the web server

Even had this annoying error when staring a debugging session from Visual Studio, and you have configured it to use IIS. I have, today actually. This is what worked for me. Disable the loopback check 1. Open the Registry Editor (click Start, click Run, type regedit and then click OK.) 2. In the Registry Editor, locate and click the following registry key: HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Lsa 3. Right-click Lsa, point to New, and then click DWORD value. 4. Type DisableLoopbackCheck and then press Enter. 5. Right DisableLoopbackCheck, and then click Modify. 6. In the Value data box, type 1, and then click OK. 7. Quit Registry Editor, and restart the computer. (I didn’t and it still worked :)) Hope this helps, and if so, spread the word. Happy Coding