Avamar：Exchange 备份失败，并显示错误“WinRM 客户端无法处理请求”

Summary: 本文提供有关解决 PowerShell 连接问题导致的 Avamar 中的 Exchange 备份失败的指导。当 Exchange 插件无法与邮箱服务器建立远程 PowerShell 会话时，通常会发生这些故障。

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Symptoms

Exchange 备份失败，并显示类似于以下内容的错误：  
2024-05-13 17:00:08 avexvss Error <0000>: Error [exchangesvr.avamar.com] Connecting to remote server failed with the following error message : The WinRM client cannot process the request. It cannot determine the content type of the HTTP response from the destination computer. The content type is absent or invalid. For more information, see the about_Remote_Troubleshooting Help topic. 
2024-05-13 17:00:08 avexvss Error <16954>: Unable to initialize Powershell interface process -- cannot continue.  
2024-05-13 17:00:08 avexvss Error <13077>: Unable to complete backup.
打开 Exchange 命令行管理程序时，可能会出现以下与 PowerShell 相关的错误：  
VERBOSE: Connecting to exchangesvr.domain.com
[exchangesvr.domain.com] Connecting to remote server failed with the following error message : The WinRM client cannot process the request. It cannot determine the content type of the HTTP response from the destination computer. The content type is absent or invalid. For more information, see the about_Remote_Troubleshooting Help topic.
    + CategoryInfo          : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [], PSRemotingTransportException
    + FullyQualifiedErrorId : PSSessionOpenFailed
VERBOSE: Connecting to exchangesvr.domain.com
VERBOSE: Connected to exchangesvr.domain.com.

Cause

Exchange 命令行管理程序连接到 客户端访问服务 （CAS） 服务器，并且只能从该计算机运行命令。Avamar Exchange 插件程序在后台运行 PowerShell 命令，以枚举数据库和检索邮箱服务器信息。

当 PowerShell 无法连接到实际邮箱服务器时，它会错误地假定 CAS 服务器是邮箱服务器。这种错误标识会导致备份失败。

Resolution

远程 PowerShell 故障可能有多个根本原因。

查看以下 Microsoft 知识库文章，了解可能的解决方案：

如果应用上述文章中的指导后问题仍然存在，请使用以下解决方法：

  1. 打开 web.config 文件位于：

    • C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\PowerShell\

  2. 搜索对以下内容的任何引用：

    • %ExchangeInstallPath%
%ExchangeInstallDir%

  3. 将这些变量替换为 Exchange 安装目录的绝对路径 ，例如：

    • C:\Program Files\Microsoft\Exchange Server\V14

此更改可确保 PowerShell 在远程会话初始化期间解析正确的路径。

Additional Information

 
 
 
 
 

Affected Products

Avamar, Avamar Plug-in for Exchange VSS
Article Properties
Article Number: 000166281
Article Type: Solution
Last Modified: 22 Oct 2025
Version:  4
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