Functions/Find-ADUser.ps1
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# Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. function Find-CADUser { <# .SYNOPSIS Finds a user in Active Directory. .DESCRIPTION Searches the Active Directory domain given by `DomainUrl` for a user whose `sAMAccountName` matches the `sAMAccountName` passed in. Returns the `DirectoryEntry` object for that user. If there are any errors communicating with the domain controller, `$null` is returned. .OUTPUTS System.DirectoryServices.DirectoryEntry. The directory entry object of the user's account in Active Directory or `$null` if the user isn't found. .LINK http://msdn.microsoft.com/en-us/library/aa746475.aspx .EXAMPLE Find-CADUser -DomainUrl LDAP://dc.example.com:389 -sAMAccountName $env:USERNAME Finds the AD user whose Windows username (sAMAccountName) is equal to thecurrently logged on user's username. #> [CmdletBinding()] param( [Parameter(Mandatory=$true)] [string] # The LDAP URL to the domain controller to contact. $DomainUrl, [Parameter(Mandatory=$true,ParameterSetName='BysAMAccountName')] [string] # Search by a user's sAMAcountName (i.e. Windows username). Special # characters are escaped. $sAMAccountName ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState $domain = [adsi] $DomainUrl $searcher = [adsisearcher] $domain $filterPropertyName = 'sAMAccountName' $filterPropertyValue = $sAMAccountName $filterPropertyValue = Format-CADSearchFilterValue $filterPropertyValue $searcher.Filter = "(&(objectClass=User) ($filterPropertyName=$filterPropertyValue))" try { $result = $searcher.FindOne() if( $result ) { $result.GetDirectoryEntry() } } catch { Write-Error ("Exception finding user {0} on domain controller {1}: {2}" -f $sAMAccountName,$DomainUrl,$_.Exception.Message) return $null } } |