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I am facing the same issue and only solution that works for me is to reboot server.
FsLogix version: 2.9.7654.46150
OS version: Windows server 2019
FsLogix - Unclean logoff causing locked files until server reboot
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Much R
101
Reputation points
Problem is described by M4deman under unclean-logoff-causing-locked-files-until-server-reboot
It seems to have something to do with the 2009 version.
The latest version of FSLogix is installed whats-new
Description
After a user logoff, the "System" Process (PID 4) locks the following folders:
C:\Users\local_username\AppData\Local\Microsoft\Credentials
C:\Users\local_username\AppData\Roaming\Microsoft\Credentials
The user is completely logged of, according to Task Manager.
In the FSLogix Profile Log file I can see the following:
[07:53:55.601][tid:00000c90.0000ce44][ERROR:00000020] Delete profile failed for sid S-1-5-21-3364776539-3721753400-1968955100-1179, Cleaning up manually. (Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird.)
The last sentence means that the process cannot access the file, because another process already uses it.
Also the whole "local_username" folder cannot be deleted:
[08:23:15.479][tid:00000c90.0000bcc4][WARN: 00000005] Failed to delete C:\Users\local_usename (Access is denied)
Access Denied
Does someone have any info on this behaviour?
Windows for business | Windows Client for IT Pros | User experience | Remote desktop services and terminal services
Windows for business | Windows Client for IT Pros | User experience | FSLogix
{count} votes
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Anonymous2021-01-14T03:03:58.32+00:00 Hello @Much R
Did you check affected user has full control and Owner over their FSLogix Folder and the VHDX files ?
Thanks
Karlie -
Much R 101 Reputation points
2021-02-02T08:02:21.997+00:00 Hello,
Where is my answer from yesterday?
Why was this deleted?How can I open a ticket at Microsoft now?
Thank you
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Anonymous
2021-02-02T08:16:39.607+00:00 Hello @Much R
sorry I was going to delete my comment as it wasn't helpful, and your comment is below mine, so it seems they were deleted together. I want to restore but it doesn't has this option.
FSLogix is supported for use with versions of Windows and Office that are still included in the Microsoft Support Lifecycle.
How to open a FSLogix Support Request
https://social.msdn.microsoft.com/Forums/en-US/14ea5f6f-760b-4ad2-83cf-23c3cbc1bcc4/how-to-open-a-fslogix-support-request?forum=FSLogixBest regards
Karlie -
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Germain 11 Reputation points2021-02-19T11:44:10.117+00:00 We are currently experiencing the same issue. The user VHDX is locked by system and can only be unlocked by rebooting the server.
Has Microsoft acknowledged this issue?Currently using: 2.9.7654.46150
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Bracko Ewald 26 Reputation points2021-02-19T12:10:09.137+00:00 Did you activate the registry value HKEY_LOCAL_MACHINE\SOFTWARE\FSLogix\Apps\CleanupInvalidSessions (REG_DWORD, 0x1)?
Do you use Cloud Cache or not?Also, maybe you can check with the frx command line tool if there are still some redirects pointing to the use VHDX file. You can then use that tool to delete them manually and detach the VHDX files afterwards using diskpart.
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Marius Neuhaus 1 Reputation point2021-03-09T10:31:38.737+00:00 Hello,
we have the same problem.
We use on-premise terminalserver.:
Windows Server 2019
Citrix 1912 CU2 LTSR
FSLogix 2.9.7621.30127I've tried the CleanupInvalidSessions RegKey, but it doesn't effect.
We don't use Cloud Cache.
FSLogix Configuration only local and not per gpo.
The frx command line tool dont show redirects pointing to the use VHDX file.
Permission are set correct. Users work correctly with the containers.
Luckily the problem occurs only randomly and not at every logoff.In the FSLogix Configuration we include the group domain-users and exclude the domain-administrators.
Could it be a Problem?Best Regards,
Marius -
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itsupport 1 Reputation point2021-05-26T12:40:37.147+00:00 When this happens are you left with multiple <USERNAME>.original folders? I've seen it go as high as <USERNAME>.original11 before I just manually delete all the folders.
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Guido Racamato 26 Reputation points2021-09-28T17:39:34.337+00:00 Hello Everyone, For the Group Policy Access Denied, once you get an affected user, could you please modify the following registry? There's no reboot required.
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileService\References\<SID affected user>
REG_BINARY: RefCount
Value: 0 -
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Jon McLeod 1 Reputation point2021-11-19T14:56:08.267+00:00 This is the answer. Thank you.
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Farooq 5 Reputation points2024-02-14T12:02:36.9533333+00:00 We are having the same issue. We have an RDS environment and time to time users get logged in with Temporary profile, when I check the FSlogix logs I am seeing the following error - Failed to open virtual disk: \server\Profiles\S-1-5-21-26711-2174_user\Profile_user.vhd (The process cannot access the file because it is being used by another process.)
What we done to try resolve this or at least try find the cause and reduce downtime is, we have removed AV from all RDS host, we have created a script which logs out all users at midnight but issue is still occurring. We have a case opened with Microsoft but unfortunately there has been no resolution. Another issue we had is where users could not sign into their Outlook, teams, Office profile on the host. Has anyone else experiencing this issue and has anyone managed to resolve this? Any help or suggestion would be much appreciated.
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David RUBIO 0 Reputation points2025-09-17T16:59:52.26+00:00 Always the same issue here also in 2025. lsass.exe pid: 944 AUTORITE NT\Système
3690: File (RWD) C:\Users*account-locked*\AppData*Local\Microsoft\Credentials*
3B2C: File (RWD) C:\Users*account-locked*\AppData*Roaming\Microsoft\Credentials*