Sharepoint access issue

Venkata Pavan Kumar Kolusu 1

I am able to access the Sharepoint online site in web browser but i am getting error "The remote server returned an error 407 Proxy Authentication Required" in ExecuteQuery method in visualstudio. Code is working for on premise sites. I am using Sharepoint2013.

Amos Wu-MSFT 4,051 Reputation points

2020-08-04T01:26:25.2+00:00

Could you share the code for further research?
Venkata Pavan Kumar Kolusu 1 Reputation point

2020-08-05T19:34:26.697+00:00

I referenced Microsoft.SharePointOnline.CSOM and Still i have the same problem.
Amos Wu-MSFT 4,051 Reputation points

2020-09-08T06:36:48.75+00:00

@Venkata Pavan Kumar Kolusu ,I have updated my suggestion in first answer,if the answer helps you ,you could accept it as answer to help other community members find the helpful information quickly.Thank you.

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2 answers

Amos Wu-MSFT 4,051 Reputation points

2020-08-04T07:20:01.213+00:00

CSOM connect SharePoint Online demo(need add Microsoft.SharePointOnline.CSOM reference):
15410-code.txt

More reference:
https://www.c-sharpcorner.com/article/connect-to-sharepoint-2013-online-using-csom-with-console-ap/

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Updated-------------------------
You could try the way in this blog:https://www.spguides.com/the-remote-server-returned-an-error-407-proxy-authentication-required/
After you run the code, you can restore these settings.
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Venkata Pavan Kumar Kolusu 1 Reputation point

2020-08-04T05:59:55.36+00:00

Venkata Pavan Kumar Kolusu 1 Reputation point

2020-08-05T20:39:16.077+00:00

@Amos Wu-MSFT

I referenced Microsoft.SharePointOnline.CSOM and Still i have the same problem.

Amos Wu-MSFT 4,051 Reputation points

2020-08-07T09:36:27.733+00:00

Could you share more information to help us reproduce your issue?Do you have any special network settings or set up a proxy server?

Venkata Pavan Kumar Kolusu 1 Reputation point

2020-08-10T13:29:18.017+00:00

I have the above proxy settings.

Amos Wu-MSFT 4,051 Reputation points

2020-08-11T02:29:48.237+00:00

You could try this:https://www.spguides.com/the-remote-server-returned-an-error-407-proxy-authentication-required/
You could restore this configure after you finish running the code.
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Trevor Seward 11,706 Reputation points

2020-08-05T20:32:06.973+00:00

Since you're using on-prem, it sounds like you have a pre-authentication proxy in front of SharePoint. You may need to bypass that proxy server if you're going to use credential-based authentication.
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Venkata Pavan Kumar Kolusu 1 Reputation point

2020-08-05T20:42:10.66+00:00

I am using Sharepoint Online site not On-Prem. How to bypass the proxy server ?
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Sharepoint access issue

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