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This message shows when I accidentally close my backup script of the SharePoint site. This massage is prompted by the SharePoint when a site is in a maintenance mode. Resolutions Method 1 Go to the central administrator Application management –> Site Collection Quotas and Locks Select the site collection and change the locks information to Not Locked . Some times this page looks like disabled thus you need to try the method two. Method 2 $Admin = new- object Microsoft .SharePoint .Administration .SPSiteAdministration ('https: //www.site/sites/sitecollection') $Admin .ClearMaintenanceMode () This PowerShell Script changes the site collection back to normal.