PowerShell : How do I fix displayName attribute for all users in Active Directory ?

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For small shops that do not leverage automated provisioning tools, they face challenge in keeping the attributes for Users and other objects in AD standardized. For similar situation, recently I was asked from Access Control team if there is an easy way to fix the displayName attribute for all users or to fill in the display name where its missing based on the Users’ first and last name. The answer is a simple PowerShell one-liner using Quest Cmdlets.

Using Get-QADUser cmdlet, you can define the location of all your users using the –searchlevel parameter or you can sweep the whole directory for all user accounts. And then pipe the results to the foreach and use Set-QADuser to fix the display names (in this example) based on the users’ first and last name

Get-QADUser mydomain.int/users -sl 0 | foreach {Set-QADUser $_ -DisplayName ("{0} {1}" -f $_.firstname,$_.lastname)}

The –sl 0 parameter defines the limit of users to 0.

PowerShell : How do I check Active Directory Tombstone Lifetime ?

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What is Active Directory Tombstone Lifetime (TSL) ?

The tombstone lifetime in an Active Directory forest determines how long a deleted object (called a “tombstone”) is retained in Active Directory Domain Services (AD DS). The tombstone lifetime is determined by the value of the tombstoneLifetime attribute on the Directory Service object in the configuration directory partition.

Directory Services veteran and MVP Joe Richards has published a short blog entry demystifying the confusion a technet article has caused in regards to how to go about figuring a TSL on a particular domain. Note that new forests that are installed with Windows Server 2003 with SP1 and up have a default tombstone lifetime of 180 days.

Joe shares his ADFIND tool to lookup the current value of the TSL attribute (irrespective of what OS was used to build the forest). Note that as Joe pointed out if this attribute is not set (i.e empty value) then the TSL is 60 days. Here I show you how to lookup the TSL with PowerShell.

Using Quest cmdlets :

Get-QADbject “CN=Directory Service,CN=Windows NT,CN=Services,CN=Configuration,DC=yourdomain,DC=int” includeallproperties | Select TombstoneLifetime

And with using native AD cmdlets (of ADWS) in Windows Server 2008 R2 :

Get-ADObject -Identity “CN=Directory Service,CN=Windows NT,CN=Services,CN=Configuration,DC=R2,DC=lab” -properties tombstonelifetime

TSL

Also within PowerShell, you can also use ADSI to lookup the TSL value.

[ADSI]$config=LDAP://cn=Directory Service,cn=Windows NT,cn=Services,cn=Configuration,DC=R2,dc=lab

$config.TombstoneLifetime

Also, here is how you can use DSQUERY from the Windows Support Tools to lookup the TSL.

dsquery * “CN=Directory Service,CN=Windows NT,CN=Services,CN=Configuration,DC=R2,DC=lab” -scope base –attr

tombstonelifetime

Note that I have used my test forest’s DN of R2.lab in above examples, be sure to replace the values with your forest’s DN. Above query should be typed in one line.