Permissions Randomly Disappearing/Reverting in SharePoint 2010

Hi everyone,

A couple of our SharePoint team sites have been experiencing an unusual phenomenon where user permissions randomly disappear or revert--all seemingly without any user involvement. I have inspected the Security Audit Logs for the past months, scouring permissions activity surrounding these events, but I have not been able to identify any user involvement that could have caused or even contributed to these issues. 

One site had a folder whose entire permissions setting became blank. Another site's group ownership reverted to a previous user who moved to a different department several months ago.

We do occasionally restore corrupted Sharepoint items from our DPM backups, but these particular sites and items have not been restored.

I have been reading through several forums and online resources, but I haven't found anything definitive. Any help would be greatly appreciated. Thanks!

April 20th, 2015 2:50pm

Any chance this can be caused by custom software, in other words, review which farm, web application, site and web features may apply and check which timer job are running
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April 22nd, 2015 2:30am

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