functions/Repair-DbaDbOrphanUser.ps1
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function Repair-DbaDbOrphanUser { <# .SYNOPSIS Finds orphan users with existing login and remaps them. .DESCRIPTION An orphan user is defined by a user that does not have a matching login (Login property = ""). If the matching login exists it must be: Enabled Not a system object Not locked Have the same name that user You can drop users that does not have their matching login by specifying the parameter -RemoveNotExisting. .PARAMETER SqlInstance The target SQL Server instance or instances. .PARAMETER SqlCredential Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential). Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported. For MFA support, please use Connect-DbaInstance. .PARAMETER Database Specifies the database(s) to process. Options for this list are auto-populated from the server. If unspecified, all databases will be processed. .PARAMETER ExcludeDatabase Specifies the database(s) to exclude from processing. Options for this list are auto-populated from the server .PARAMETER Users Specifies the list of usernames to repair. .PARAMETER Force Forces alter schema to dbo owner so users can be dropped. .PARAMETER RemoveNotExisting If this switch is enabled, all users that do not have a matching login will be dropped from the database. .PARAMETER WhatIf If this switch is enabled, no actions are performed but informational messages will be displayed that explain what would happen if the command were to run. .PARAMETER Confirm If this switch is enabled, you will be prompted for confirmation before executing any operations that change state. .PARAMETER EnableException By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message. This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting. Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch. .NOTES Tags: Orphan Author: Claudio Silva (@ClaudioESSilva) | Simone Bizzotto (@niphlod) Website: https://dbatools.io Copyright: (c) 2018 by dbatools, licensed under MIT License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Repair-DbaDbOrphanUser .EXAMPLE PS C:\> Repair-DbaDbOrphanUser -SqlInstance sql2005 Finds and repairs all orphan users of all databases present on server 'sql2005' .EXAMPLE PS C:\> Repair-DbaDbOrphanUser -SqlInstance sqlserver2014a -SqlCredential $cred Finds and repair all orphan users in all databases present on server 'sqlserver2014a'. SQL credentials are used to authenticate to the server. .EXAMPLE PS C:\> Repair-DbaDbOrphanUser -SqlInstance sqlserver2014a -Database db1, db2 Finds and repairs all orphan users in both db1 and db2 databases. .EXAMPLE PS C:\> Repair-DbaDbOrphanUser -SqlInstance sqlserver2014a -Database db1 -Users OrphanUser Finds and repairs user 'OrphanUser' in 'db1' database. .EXAMPLE PS C:\> Repair-DbaDbOrphanUser -SqlInstance sqlserver2014a -Users OrphanUser Finds and repairs user 'OrphanUser' on all databases .EXAMPLE PS C:\> Repair-DbaDbOrphanUser -SqlInstance sqlserver2014a -RemoveNotExisting Finds all orphan users of all databases present on server 'sqlserver2014a'. Removes all users that do not have matching Logins. #> [CmdletBinding(SupportsShouldProcess, ConfirmImpact = "Medium")] param ( [parameter(Mandatory, ValueFromPipeline)] [DbaInstanceParameter[]]$SqlInstance, [PSCredential]$SqlCredential, [object[]]$Database, [object[]]$ExcludeDatabase, [parameter(ValueFromPipeline)] [object[]]$Users, [switch]$RemoveNotExisting, [switch]$Force, [switch]$EnableException ) begin { if ($Force) { $ConfirmPreference = 'none' } } process { foreach ($instance in $SqlInstance) { try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential } catch { Write-Message -Level Warning -Message "Failed to connect to: $SqlInstance." continue } $DatabaseCollection = $server.Databases | Where-Object IsAccessible if ($Database) { $DatabaseCollection = $DatabaseCollection | Where-Object Name -In $Database } if ($ExcludeDatabase) { $DatabaseCollection = $DatabaseCollection | Where-Object Name -NotIn $ExcludeDatabase } if ($DatabaseCollection.Count -gt 0) { foreach ($db in $DatabaseCollection) { try { Write-Message -Level Verbose -Message "Validating users on database '$db'." if ($Users.Count -eq 0) { #the third validation will remove from list sql users without login. The rule here is Sid with length higher than 16 $UsersToWork = $db.Users | Where-Object { $_.Login -eq "" -and ($_.ID -gt 4) -and (($_.Sid.Length -gt 16 -and $_.LoginType -in @([Microsoft.SqlServer.Management.Smo.LoginType]::SqlLogin, [Microsoft.SqlServer.Management.Smo.LoginType]::Certificate)) -eq $false) } } else { #the fourth validation will remove from list sql users without login. The rule here is Sid with length higher than 16 $UsersToWork = $db.Users | Where-Object { $_.Login -eq "" -and ($_.ID -gt 4) -and ($Users -contains $_.Name) -and (($_.Sid.Length -gt 16 -and $_.LoginType -in @([Microsoft.SqlServer.Management.Smo.LoginType]::SqlLogin, [Microsoft.SqlServer.Management.Smo.LoginType]::Certificate)) -eq $false) } } if ($UsersToWork.Count -gt 0) { Write-Message -Level Verbose -Message "Orphan users found" $UsersToRemove = @() foreach ($User in $UsersToWork) { $ExistLogin = $server.logins | Where-Object { $_.Isdisabled -eq $False -and $_.IsSystemObject -eq $False -and $_.IsLocked -eq $False -and $_.Name -eq $User.Name } if ($ExistLogin) { if ($server.versionMajor -gt 8) { $query = "ALTER USER " + $User + " WITH LOGIN = " + $User } else { $query = "exec sp_change_users_login 'update_one', '$User'" } if ($Pscmdlet.ShouldProcess($db.Name, "Mapping user '$($User.Name)'")) { $server.Databases[$db.Name].ExecuteNonQuery($query) | Out-Null Write-Message -Level Verbose -Message "User '$($User.Name)' mapped with their login." [PSCustomObject]@{ ComputerName = $server.ComputerName InstanceName = $server.ServiceName SqlInstance = $server.DomainInstanceName DatabaseName = $db.Name User = $User.Name Status = "Success" } } } else { if ($RemoveNotExisting) { #add user to collection $UsersToRemove += $User } else { Write-Message -Level Verbose -Message "Orphan user $($User.Name) does not have matching login." [PSCustomObject]@{ ComputerName = $server.ComputerName InstanceName = $server.ServiceName SqlInstance = $server.DomainInstanceName DatabaseName = $db.Name User = $User.Name Status = "No matching login" } } } } #With the collection complete invoke remove. if ($RemoveNotExisting) { if ($Force) { if ($Pscmdlet.ShouldProcess($db.Name, "Remove-DbaDbOrphanUser")) { Write-Message -Level Verbose -Message "Calling 'Remove-DbaDbOrphanUser' with -Force." Remove-DbaDbOrphanUser -SqlInstance $server -Database $db.Name -User $UsersToRemove -Force } } else { if ($Pscmdlet.ShouldProcess($db.Name, "Remove-DbaDbOrphanUser")) { Write-Message -Level Verbose -Message "Calling 'Remove-DbaDbOrphanUser'." Remove-DbaDbOrphanUser -SqlInstance $server -Database $db.Name -User $UsersToRemove } } } } else { Write-Message -Level Verbose -Message "No orphan users found on database '$db'." } #reset collection $UsersToWork = $null } catch { Stop-Function -Message $_ -Continue } } } else { Write-Message -Level Verbose -Message "There are no databases to analyse." } } } } |