Issues Fixed / Enhancements
Online help changed to redirect all online help to docs.backupexec.com instead of vxhelp.veritas.com.
Hyper-V: Jobs hang intermittently on random VMs.
Non-English BE console shows the console tabs in English.
M365: Handling for redirect URL error for Exchange Mailboxes.
M365: Special handling for internal server error in SyncFolderItem call.
Affected Versions
Backup Exec 25.1 x64bit Media Servers
Backup Exec 25.1 Agent for Windows Servers
Backup Exec 25.1 x64bit Remote Administration Console
Backup Exec 25.1 Remote Media Agent for Linux Servers
Backup Exec 25.1 Remote Agent for Linux and Unix Servers
Prerequisites
This hotfix must be installed over Backup Exec 25.1 Hotfix 648897 (version 25.0.1193.1364).
Note: 25.0.1193.1364 is Backup Exec 25.1 + Hotfix 648897.
To confirm your current version of Backup Exec, click on the Backup Exec icon (top left in the Backup Exec console) -> Help and Documentation -> About Backup Exec.
Managed Backup Exec Servers: To install the hotfix on a Managed Backup Exec Server, ensure it is patched on the Central Administration Server first, and only then apply the patch on the Managed Backup Exec Server.
Post-requisites
A full backup is recommended after installing this On-Demand Patch.
Remote Agent for Windows Servers will need to be updated.
Remote Agent for Linux/Unix Servers (RALUS/RAMS) will need to be updated.
Update Simplified Disaster Recovery Media.
It is recommended to reboot the system(s) after applying an On-Demand Patch or Feature Pack.
Uninstalling this Update
This update cannot be uninstalled.
Download Instructions
The patch can be downloaded from the Backup Exec Support Home.
Note: All patches mentioned here should be downloaded from the above link. After logging in, browse to the Downloads section to access this patch.

This Backup Exec 25 update 661496 includes several enhancements to improve performance, reliability, and ease of use. It provides specific fixes for Hyper-V jobs, Microsoft 365 backups, and console localizations.
References
Review the Backup Exec for Windows Servers hotfix and service pack installation guide prior to installation.