1. An Active Directory Health Check through PowerShell
Jeff Wouters | MVP Windows PowerShell
[CEO | Automation Methos
BSc, MCT, MVP, MCSA, MCSE, MCTS, MCITP

2. possessod
PowerShell Script of System Center Documentation
PSSOSCD

3. Whatcha doin’? Users Groups Trusts Replication Subnets Sites DC’s
GPO’s

4. Bumps along the way… LDAP + ForEach + Where-Object =
Maximum LDAP query results…

5. Execution time vs …
Cmdlets
ADSI
LDAP
.NET

6. ForEach vs ForEach-Object
ForEach = Slower
ForEach-Object = More memory consuming
Note: This is a huge over-simplification
Watch the Hey!ScriptingGuy blog… 

7. The problem is choice… Backwards compatibility is a bitch!
*** Start upgrading already!!! ***
Which PowerShell versions to support?
Which Operating Systems to support?
Which Domain Level to support?
Include GPO?
Include DNS?
Include DHCP?
Support domains and/or forests?