C# 仅SharePoint应用程序身份验证抛出“；远程服务器返回错误：（401）未经授权。”；

我正在尝试使用oAuth或仅应用程序身份验证进行sharepoint身份验证，但它给出错误“远程服务器返回错误：（401）未经授权。”

我正在使用试用sharepoint租户

以下是我的代码片段：

使用客户端id和客户端密码：

string siteUrl = "[Sharepoint-Site-URL]";

//Sharepoint App details
string SPClientId = @"[Client-id]";
string SPClientSecret = @"[Client-secret]";
using (ClientContext context = new OfficeDevPnP.Core.AuthenticationManager().GetAppOnlyAuthenticatedContext(siteUrl, SPClientId, SPClientSecret))
 {
     context.Load(context.Web, t => t.Title);
     context.ExecuteQuery();
     Console.WriteLine(context.Web.Title);
 };

 string siteUrl = "[Sharepoint-Site-URL]";
 string realm = TokenHelper.GetRealmFromTargetUrl(new Uri(siteUrl));

 //Get the access token for the URL.  
 string accessToken = TokenHelper.GetAppOnlyAccessToken(TokenHelper.SharePointPrincipal, new Uri(siteUrl).Authority, realm).AccessToken;

 //Create a client context object based on the retrieved access token
 using (ClientContext context = TokenHelper.GetClientContextWithAccessToken(siteUrl, accessToken))
 {
    context.Load(cc.Web, t => t.Title);
    context.ExecuteQuery();
    Console.WriteLine(cc.Web.Title);
 }
enter code here

使用AccessToken:

string siteUrl = "[Sharepoint-Site-URL]";

//Sharepoint App details
string SPClientId = @"[Client-id]";
string SPClientSecret = @"[Client-secret]";
using (ClientContext context = new OfficeDevPnP.Core.AuthenticationManager().GetAppOnlyAuthenticatedContext(siteUrl, SPClientId, SPClientSecret))
 {
     context.Load(context.Web, t => t.Title);
     context.ExecuteQuery();
     Console.WriteLine(context.Web.Title);
 };

 string siteUrl = "[Sharepoint-Site-URL]";
 string realm = TokenHelper.GetRealmFromTargetUrl(new Uri(siteUrl));

 //Get the access token for the URL.  
 string accessToken = TokenHelper.GetAppOnlyAccessToken(TokenHelper.SharePointPrincipal, new Uri(siteUrl).Authority, realm).AccessToken;

 //Create a client context object based on the retrieved access token
 using (ClientContext context = TokenHelper.GetClientContextWithAccessToken(siteUrl, accessToken))
 {
    context.Load(cc.Web, t => t.Title);
    context.ExecuteQuery();
    Console.WriteLine(cc.Web.Title);
 }
enter code here

我参考了以下文章：

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这可能是因为您的租户中禁用了SharePoint应用程序权限

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您可以运行命令来启用它：

Set SPOTenant-DisableCustomAppAuthentication$false

sharepoint是azure资源吗？我今天也收到了401错误太好了，非常感谢@Michael Han！