Avamar：Exchange 備份失敗，並顯示錯誤「WinRM 用戶端無法處理要求」
Summary: 本文提供解決 PowerShell 連線問題在 Avamar 中造成的 Exchange 備份失敗的指南。當 Exchange 附掛程式無法與信箱伺服器建立遠端 PowerShell 工作階段時，通常會發生這些故障。
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Symptoms
Exchange 備份失敗，並出現類似以下的錯誤：
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.
開啟 Exchange 命令行管理程式時，可能會出現下列與 PowerShell 相關的錯誤：
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 命令行管理程式連接到 用戶端訪問服務 （CAS） 伺服器，並且只能從該電腦運行命令。Avamar Exchange 附掛程式會在背景執行 PowerShell 命令，以列舉資料庫並擷取信箱伺服器資訊。
當 PowerShell 無法連接到實際的郵箱伺服器時，它會錯誤地假定 CAS 伺服器是郵箱伺服器。此錯誤識別會導致備份失敗。
Resolution
遠端 PowerShell 故障可能有多個根本原因。
請檢閱下列 Microsoft KB 文章，以取得可能的解決方案：
- https://support.microsoft.com/kb/2028305 （外部連結）
- https://learn.microsoft.com/en-us/troubleshoot/exchange/administration/winrm-cannot-process-request （外部連結）
如果在套用上述文章中的指南後問題仍然存在，請使用下列因應措施：
-
開啟
web.config檔案位於：-
C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\PowerShell\
-
-
搜尋以下來源的任何參考資料：
-
%ExchangeInstallPath% %ExchangeInstallDir%
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將這些變數替換為 Exchange 安裝目錄的絕對路徑 ，例如：
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C:\Program Files\Microsoft\Exchange Server\V14
-
此變更可確保 PowerShell 在遠端工作階段初始化期間解析正確的路徑。
Additional Information
Affected Products
Avamar, Avamar Plug-in for Exchange VSSArticle Properties
Article Number: 000166281
Article Type: Solution
Last Modified: 22 Oct 2025
Version: 4
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