使用Microsoft.SDK.Graph中的GraphClient，我可以看到查询在fiddler中发出，它们都没有使用HTTP/2.0，但我得到以下错误：
参数异常：当前仅支持HTTP/1.0和HTTP/1.1版本请求。参数名：价值

private async Task<UserAccount> FetchAzurePropsFromGraph()
        {
            var scopes = new[] { "User.Read" };
            var clientId = EWSMailboxSyncProvider.CLIENT_ID;
            var tenantId = ServicesConfiguration.GetStoredTenantID();
            System.Net.Http.HttpClient client = new System.Net.Http.HttpClient();
            var transport = new Azure.Core.Pipeline.HttpClientTransport(client);
            var options = new TokenCredentialOptions
            {
                AuthorityHost = AzureAuthorityHosts.AzurePublicCloud,
                Transport = transport
            };

            var userNamePasswordCredential = new UsernamePasswordCredential(
                    _o365UserName, _o365Password, tenantId, clientId, options);
            var graphClient = new Microsoft.Graph.GraphServiceClient(userNamePasswordCredential, scopes);
            var user = await graphClient.Users[_emailAddress].Request().GetAsync();
            var result = new UserAccount();
            if (user != null)
            {
                result.DisplayName = user.DisplayName;
                result.City = user.City;
                result.Company = user.CompanyName;
                result.DisabledAccount = !(user.AccountEnabled ?? true);
                result.DistinguishedName = user.OnPremisesDistinguishedName;
                result.DomainName = user.OnPremisesDomainName;
                result.EmailAddresses.Add(user.Mail);
                foreach (var mail in user.OtherMails)
                {
                    result.EmailAddresses.Add(mail);
                }
            }
            return result;
        }