Managing DHCP on DHCP server:

Add-WindowsFeature -Name DHCP –IncludeManagementTools

Managing DHCP on remote host:

Add-WindowsFeature RSAT-DHCP

Powershell DHCP Module:

Import-Module DhcpServer

Get all DHCP servers in AD

Get-DhcpServerInDC

Get DHCP scope configuration

Get-DhcpServerv4Scope –ComputerName <DHCPServerName>

Get DHCP reservations on scope:

Get-DhcpServerv4Reservation -ComputerName <DHCPServerName> -ScopeId <ScopeID>

Import/Export DHCP Scopes

netsh dhcp server export C:\temp\DHCP.txt all

netsh dhcp server import C:\temp\DHCP.txt all

Note: The temp folder needs to be created

Check DHCP Replication Failover Status

Get-DhcpServerv4Failover -ComputerName <DHCPServerName>

Reference:
https://technet.microsoft.com/en-us/library/jj590708(v=wps.630).aspx

PowerShell Script for removing the “Windows.old” folder using cleanmgr.exe command line

New-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\Temporary Setup Files' -PropertyType 'DWORD' -Force -Name 'StateFlags1337' -Value 0x2
New-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\Previous Installations' -PropertyType 'DWORD' -Force -Name 'StateFlags1337' -Value 0x2
cleanmgr.exe /SAGERUN:1337

Great post on the syntax of “Cleanmgr.exe”

https://winaero.com/blog/cleanmgr-exe-command-line-arguments-in-windows-10/ 

Basic objective, we’ve got a ton of shares which we need to move to a new server. The data has already been replicated but we need to re-share.
There are methods of doing this by exporting the registry but being a little scared of messing up the current shares and requiring a reboot I decided to do this manually…

Export list of shares on source server:

get-WmiObject -class Win32_Share -computer servername.fqdn.com | Export-Csv -Path "C:\Shares.csv"

Create shares on destination server:

Powershell:

Need the powershell command here

CMD Net Share

net share "ShareName"="D:\Path\FolderName" /grant:everyone,FULL

Reference:
https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/export-csv?view=powershell-6
https://gallery.technet.microsoft.com/scriptcenter/Creates-New-Share-with-fb22d905
http://www.tomsitpro.com/articles/use-fileshare-powershell-cmdlets-server-2016,2-1053.html

Add Windows Firewall exclusions for Microsoft SQL using PowerShell

Set-ExecutionPolicy -ExecutionPolicy RemoteSigned
#Enabling SQL Server Ports
New-NetFirewallRule -DisplayName “SQL Server” -Direction Inbound –Protocol TCP –LocalPort 1433 -Action allow
New-NetFirewallRule -DisplayName “SQL Admin Connection” -Direction Inbound –Protocol TCP –LocalPort 1434 -Action allow
New-NetFirewallRule -DisplayName “SQL Database Management” -Direction Inbound –Protocol UDP –LocalPort 1434 -Action allow
New-NetFirewallRule -DisplayName “SQL Service Broker” -Direction Inbound –Protocol TCP –LocalPort 4022 -Action allow
New-NetFirewallRule -DisplayName “SQL Debugger/RPC” -Direction Inbound –Protocol TCP –LocalPort 135 -Action allow
#Enabling SQL Analysis Ports
New-NetFirewallRule -DisplayName “SQL Analysis Services” -Direction Inbound –Protocol TCP –LocalPort 2383 -Action allow
New-NetFirewallRule -DisplayName “SQL Browser” -Direction Inbound –Protocol TCP –LocalPort 2382 -Action allow
#Enabling Misc. Applications
New-NetFirewallRule -DisplayName “HTTP” -Direction Inbound –Protocol TCP –LocalPort 80 -Action allow
New-NetFirewallRule -DisplayName “SSL” -Direction Inbound –Protocol TCP –LocalPort 443 -Action allow
New-NetFirewallRule -DisplayName “SQL Server Browse Button Service” -Direction Inbound –Protocol UDP –LocalPort 1433 -Action allow
#Enable Windows Firewall
Set-NetFirewallProfile -DefaultInboundAction Block -DefaultOutboundAction Allow -NotifyOnListen True -AllowUnicastResponseToMulticast True

Trying to completely remove WSUS isn’t as straight forward as uninstalling the role.
These steps are based on WSUS using the WID database (Not SQL)

In Summary:

• Remove Windows Update Servers (WSUS) role & Windows Internal Database (WID)
• Remove WSUS cache & Update Services directories
• Remove WSUS website in IIS
• Reboot

PowerShell:

Uninstall-WindowsFeature -Name UpdateServices,Windows-Internal-Database
Remove-Item –path D:\WSUS, C:\Windows\WID –recurse
Remove-Item –path C:\Users\MSSQL$MICROSOFT##WID
Remove-Item –path C:\Scripts, C:\Temp –recurse

Remove-Item –path C:\Program Files\Update Services –recurse 

Remove-WebSite -Name "WSUS Administration"
Restart-Computer

References: ServerFault

A few random PowerShell commands in Windows to help complete tasks:

Create New AD User:

New-ADUser -SamAccountName U1 -Name "User 1" -AccountPassword (ConvertToSecureString -AsPlainText "p@ssw0rd" -Force) -Enabled $true -Path 'OU=Test,DC=FABRIKAM,DC=COM'

Displays if “Desktop Experience” is installed:

Get-WindowsFeature *Desktop*

Installs “Desktop Experience” Feature:

Add-WindowsFeature Desktop-Experience

Remove Windows Patches

wusa /uninstall /kb:2952664

Clear all log entries
Although previous logs in event viewer can be helpful for diagnostics, I find old errors sometime cloud the current issues. In order to quickly clear all evertvwr logs entries you can use the following powershell command

wevtutil el | Foreach-Object {Write-Host "Clearing $_"; wevtutil cl "$_"}

Bypass code Execution

Usually if you get this error “PowerShell says “execution of scripts is disabled on this system.” the quick option is to bypass the execution policy:

Set-ExecutionPolicy Unrestricted