Adjust Distributed Cache and STS
https://www.habaneroconsulting.com/stories/insights/2013/sharepoint-2013-distributed-cache-bug#.VC7331fdb3U https://blogs.msdn.microsoft.com/sambetts/2015/10/20/why-sharepoint-check-permissions-can-give-wrong-results-for-ad-groups/ Modified sts external token instead of 1 day to 2 hours $cs = [Microsoft.SharePoint.Administration.SPWebService]::ContentService $cs.TokenTimeout = New-TimeSpan -Hours 2 $cs.Update() Added <appSettings><add key="backgroundGC" value="true"/></appSettings> in the distributed DistributedCacheService.exe.config Then I will need to set the following: Get-SPDistributedCacheClientSetting -ContainerType DistributedLogonTokenCache $DLTC = Get-SPDistributedCacheClientSetting -ContainerType DistributedLogonTokenCache $DLTC.maxBufferPoolSize = "1073741824" $DLTC.maxBufferSize = "33554432" $DLTC.requestTimeout = "3000" $DLTC.chann...