SCCM KB4575790.
A client update is available to resolve the following issues with the Configuration Manager client setup program (ccmsetup.exe).
1. 当云管理网关 (CMG) is configured to use a cloud distribution point, ccmsetup.exe is unable to download the client installation file (ccmsetup.cab) 来自Azure Blob存储. 这导致CMG流量增加. 它还延迟了客户端的安装或升级，因为如果可用，它将倒退以使用另一个管理点。类似于以下的错误记录在客户端的ccmsetup.log中.
[CCMHTTP] ERROR: URL=https://{Azure_blob_storage}:443/content-l0000003/ccmsetup.cab?..., Port=443, Options=224, Code=0, Text=CCM_E_BAD_HTTP_STATUS_CODE
[CCMHTTP] ERROR INFO: StatusCode=400 StatusText=Authentication information is not given in the correct format. Check the value of Authorization header.2. 安装以下更新汇总后，仅使用PKI客户端证书进行身份验证的面向互联网客户无法安装或升级.
如果选项，则会发生这种情况 Use PKI client certificate (客户身份验证功能) 如果可用 在网站属性的“通信安全性”选项卡上禁用. 类似于以下的错误记录在客户端上的ccmsetup.log文件中.
Client is not allowed to use PKI issued certificate or not able to use AAD token or ContentToken thus can not talk in HTTPS.
Failed to download client files by BITS. Error 0x8000ffff
