Windows Server Related

• Deployment of a plan fails when a Windows Server 2025 is added as a proxy on Hyper-V Windows Server 2022.
• Symptom
• When you add Windows Server 2025 as a proxy on Hyper-V Windows Server 2022, the deployment of a plan fails, and the following error occurs:
• Unable to apply ‘plan’ to proxy ‘<node name>’. (The Arcserve UDP Agent web service on the proxy "<node name>" is busy. Retry later.)
• Solution
• As a workaround, add Windows Server 2025 as a proxy to UDP Console with Windows Server 2025 or higher Windows version.



• Remote deployment of agent to Windows Server Core OS (2008 R2, 2012, 2012 R2, 2016, 2019, 2022, and 2025) is failing from the UDP Console UI.
• Symptom
• When you remotely deploy the agent to Windows Server Core OS from the UDP Console, the agent deployment fails.
• Solution 1
• Windows Server Core has minimal features to support specific server roles. The oledlg.dll file is not included with the Windows Server Core installation.
• As a workaround, do the following:
1. From a full installation of Microsoft Windows Server of the same OS distribution, search for oledlg.dll.
2. Copy oledlg.dll from C:\Windows\System32 and C:\Windows\SysWOW64 of the Windows full installation Server, and then place it in the corresponding directories on server core.
3. Enable WOW-mode for Server Core. To enable wow-mode, run the following command:
4. dism /online /enable-feature /featurename:ServerCore-WOW64

Note: The above solution is also applicable for the silent installation of UDP Agent.

• Solution 2
• Starting with Windows Server 2019, Microsoft provides the Application Compatibility Feature on Demand (FoD), which offers a more secure installation method and includes Windows updates and additional features.
• For Windows Server Core 2019, 2022, and 2025, we recommend installing the Application Compatibility Feature on Demand (FoD) instead of manually copying oledlg.dll. This method installs oledlg.dll, ensures that UDP installation runs correctly, and provides limited support for mmc.exe and explorer.exe on Server Core.
• For more information about installation steps, see Install the Application Compatibility Feature on Demand on Server Core.