Server 2008 r2- permissions changing on shared folder

On a 2008 r2 server, we have a shared folder. We've set the security to include access to domain users, read/write and execute.

The problem is that the domain users security permissions disappear. Only admins remain.

What could be causing this security permission object to disappear?
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I would start with a reboot & chkdsk.
Emmanuel AdebayoGlobal Windows Infrastructure Engineer - ConsultantCommented:

Can you enable folder permission auditing and assign the permission again, when the Domain Users group is removed from the list, it will be recorded in event log and you can find the root cause.

To enable folder permission auditing, please follow the below steps:

1. Click start and run "gpedit.msc" without quotes.

2. Open the [Computer Configuration\Windows Settings\Security Settings\Local Policies\Audit Policy]

3. Enable the Audit object access for "Success" and "Failure".

4. Go to the Shared folder, right click the folder and select properties.

5. Go to Security Page and click Advanced.

6. Click Auditing and Edit.

7. Click add, type everyone in the Select User, Computer, or Group.

8. Choose Apply onto: This folder, subfolders and files.

9. Tick on the box "Change permissions"

10. Click OK.

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MRH-ITSAuthor Commented:
The issue went away for some reason- We believe it had to do with a software vendor doing some configs.
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