(SP2013) An User is keep losing Permission/Access to a site randomly

Question

Hello, this is in SharePoint 2013.

About twice a month, an user has issued a problem where he/she keep losing access to a SharePoint site. It just occurs randomly and I have no idea how to tackle this issue... Espeically with people working remotly, it doesn't help the situation either.

Is there a reason for this or a way i can see when or who has updated a permission?

P.S. Hating this new site btw... Will miss Technet website, sigh.

Answer 1

This issue could be caused by that the SID in the User Profile Service Application (UPA) did not match the SID in the User Information List used by the site collection.

You can try to update the SID of the User Profile Full table in the Profile DB. Here are two option for you:

First: delete all the of the problem profiles and re-import them

Second: update the user's SID in the User Profile Full table by using Move-SPUser PowerShell command (must be an administrator account)
For example:

 $url = "http://www.example.com/"              # your web application
 $claimsAcc = "i:0#.w|contoso\user name"   # user account
 $user = Get-SPUser -Identity $claimsAcc -Web $url
 Move-SPUser -Identity $user -NewAlias $claimsAcc -IgnoreSID

Please refer to the article that SharePoint: Users randomly lose permission – are deleted from site