OneDrive Untrusted Mount Point

[Fross]

TCC 36.00.23 x64 Windows 11 [Version 10.0.26200.8117]
TCC Build 23 Windows 11 Build 26200

With Onedrive, I mount the "Personal Vault" to backup certain files. With the latest build, after mounting the personal vault, I receive an error when I try to cdd into it.

D:\Users\Michael\OneDrive>cd "Personal Vault"\
CDD D:\Users\Michael\OneDrive\Personal Vault
TCC: (Sys) The path cannot be traversed because it contains an untrusted mount point.
 "D:\Users\Michael\OneDrive\Personal Vault"

Windows Explorer and CMD both don't have issues.

The "Personal Vault" is a hidden junction in my OneDrive folder.

D:\Users\Michael\OneDrive>dir /ah

 Volume in drive D is Data Volume  Serial number is 9e63:c669
 Directory of  D:\Users\Michael\OneDrive\*

 4/09/2026   9:18a   <JUNCTION>    Personal Vault [Volume{236b952c-0000-0000-0000-100000000000}\VaultData]

I'm not certain what an "untrusted mount point" is exactly. Did anything change in a later build? Anyone else use this OneDrive feature?

Michael

 

[vefatica]

I know little about this and I'm very curious. Can you access it with CDD \\?\C:\path\to\junction?

 

[Fross]

Hi Vince. I receive the same error.

D:\Users\Michael\OneDrive>cdd "\\?\D:\Users\Michael\OneDrive\Personal Vault"\
CDD \\?\D:\Users\Michael\OneDrive\Personal Vault
TCC: (Sys) The path cannot be traversed because it contains an untrusted mount point.
 "\\?\D:\Users\Michael\OneDrive\Personal Vault"

I don't have any issues moving into other junctions (I use them quite a bit).

 

[vefatica]

Did you create the junction while elevated? Can you access it while elavated? I'm just asking questions based on Chatgpt's responses.

 

[Fross]

I don't actually create junction myself. When you mount the personal vault through the OneDrive app, it creates the junction. When you unmount it, it is removed.

 

[Fross]

Thanks for the help Vince. I rebooted and it seems to be working. I think something got goobered up with OneDrive.

I thought the days of always rebooting when you had a windows issue were behind us, but I guess I was wrong.

 

[vefatica]

Doesn't it unmount automatically after a not very generous amount of time?

 

[Fross]

Yes. It defaults to 20 min but can be changed for up to 4 hrs.