Exporting and Importing DHCP database

netsh dhcp server export c:\dhcp.txt all

 netsh dhcp server import c:\dhcp.txt all

Unauthorizing a DHCP Server:

How to Use PowerShell ISE to Trigger a Full Password Sync in Azure AD Sync

$adConnector = "xxx.com"

$aadConnector = "xxx.com.my - AAD"

Import-Module adsync

$c = Get-ADSyncConnector -Name $adConnector

$p = New-Object Microsoft.IdentityManagement.PowerShell.ObjectModel.ConfigurationParameter "Microsoft.Synchronize.ForceFullPasswordSync", String, ConnectorGlobal, $null, $null, $null

$p.Value = 1

$c.GlobalParameters.Remove($p.Name)

$c.GlobalParameters.Add($p)

$c = Add-ADSyncConnector -Connector $c

Set-ADSyncAADPasswordSyncConfiguration -SourceConnector $adConnector -TargetConnector $aadConnector -Enable $false

Set-ADSyncAADPasswordSyncConfiguration -SourceConnector $adConnector -TargetConnector $aadConnector -Enable $true

Azure AD Connect

Connect with the Microsoft Azure Active Directory Module for Windows PowerShell:

 






Windows PowerShell Version Check:

$psversiontable

Install required software:

Install-Module MSOnline

 

Creates a credential object:
$cred = Get-Credential

Connect to all Office 365 services:
Connect-MsolService -Credential $cred

 

Gets company-level information:

Get-MsolCompanyInformation 

Stop the scheduler:
Stop-ADSyncSyncCycle

Turn off directory synchronization:
Set-MsolDirSyncEnabled -EnableDirsync $false

See Scheduler configuration:
Get-ADSyncScheduler

Start the scheduler:
The scheduler is by default run every 30 minutes, It could be that you have an urgent change that must be synchronized immediately.
Delta sync cycle:
Start-ADSyncSyncCycle -PolicyType Delta
Full sync cycle:
Start-ADSyncSyncCycle -PolicyType Initial

Turn on directory synchronization:
Set-MsolDirSyncEnabled -EnableDirSync $true

Gets the directory synchronization settings:
When installing Azure AD Connect, prevent accidental deletes is enabled by default and configured to not allow an export with more than 500 deletes.
Get-MsolDirSyncConfiguration

Gets the status of identity synchronization features for a tenant:
Get-MsolDirSyncFeature

 
Azure AD Connect: Automatic upgrade:
Making sure your Azure AD Connect installation is always up to date.

Set-ADSyncAutoUpgrade -AutoUpgradeState Enabled

Subnet Mask Cheat Sheet

	Addresses	Hosts	Netmask	Amount of a Class C
/30	4	2	255.255.255.252	1/64
/29	8	6	255.255.255.248	1/32
/28	16	14	255.255.255.240	1/16
/27	32	30	255.255.255.224	1/8
/26	64	62	255.255.255.192	1/4
/25	128	126	255.255.255.128	1/2
/24	256	254	255.255.255.0	1
/23	512	510	255.255.254.0	2
/22	1024	1022	255.255.252.0	4
/21	2048	2046	255.255.248.0	8
/20	4096	4094	255.255.240.0	16
/19	8192	8190	255.255.224.0	32
/18	16384	16382	255.255.192.0	64
/17	32768	32766	255.255.128.0	128
/16	65536	65534	255.255.0.0	256