MicrosoftWe also have huge issues after updating to 25.02. on Windows Server 2019/2022 RDS. Corrupted profile disks and also user settings that didn't apply anymore, we think it's related to group policy settings, not the one from FSL but the normal user settings. Users got the wrong system language or registry entries where missing. We also had this event id 26.
One thing, that can get really bad is, that some of the FSL group policy settings are no enabled by default if you haven't configured the settings before. Not configured means ENABLED in some cases! Check the release notes! One example is the compact VHD feature. If the profile disks haven’t been compacted for a long time, this process will start and can take a long time to finish. It depends on your users how they react to this. Some users are not that patient, so they try to logon again after logout and the profile might be in access for shrinking.
We encountered a black screen issue for Windows Server 2022 users. Even after removing all user profiles, the problem persisted.
I don’t believe the Compact VHD feature is the root cause. Microsoft needs to investigate further to identify the bug in the latest FSLogix version.
