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point mailbox to another AD account

How to attach existing user mailbox to a new user in different domain

Understanding the Mailbox Move Request in Exchange 2010

Moving Mailboxes the Exchange 2010 Way

How to move mailbox from one Exchange 2010 to another (different domain)?

Moving Mailboxes in Exchange 2010 (Part 1)

How to Move Mailboxes in Exchange Server 2010

Easiest method to move Exchange mailboxes to new server?

Migrating Exchange 2010 mailboxes between domains how to….

How to change owner of a mailbox

Re-assign an exchange 2010 mailbox to another user

assign existing mailbox to a new user account

exchange 2010 reasign mailbox to another user

Re-assign an exchange 2010 mailbox to another user

Re-assign an exchange 2010 mailbox to another user

Exchange 2010 – Link mailbox with another AD account

How can I change which AD account an Exchange mailbox is connected to without deleting the account?

how to I assign an existing mailbox to a new user in Exchange 2010

Moving a Exchange 2007/2010 mailbox to another user

Move Exchange Mailbox Data “User A” to “User B” – User “A” got fired

Create new AD user accounts for all users, keep old mailbox/email address

Changing account of linked mailbox

Re-assign existing mailbox to new user

Existing mailbox assign to another user

moving mailboxes from one AD account to another – GUI

link old mailbox to New AD user account

HOW TO: Reconnect a mailbox to another user

Understanding Move Requests

How can I change which AD account an Exchange mailbox is connected to without deleting the account?

Active Directory (AD)

What are subnets? 

Subnets map network addresses to sites

Subnets identify the network addresses that map computers to AD DS sites. A subnet is a segment of a TCP/IP network to which a set of logical IP addresses are assigned. A site can consist of one or more subnets.

Keep your subnet information up to date

When you design your AD DS site configuration, it’s critical that you correctly map IP subnets to sites. Similarly, if the underlying network configuration changes, make sure that you update the configuration to reflect the new site mapping. Domain controllers use the AD DS subnet information to map client computers and servers to sites. If this mapping isn’t accurate, operations such as logon traffic and applying GPOs are likely to occur across WAN links, and may be disruptive.

When to create more OUs? 

Although you can manage a small organization without creating additional OUs, even small organizations typically create an OU hierarchy. An OU hierarchy lets you subdivide the administration of your domain for management purposes. There are basically two reasons to create OUs.

Application of GPOs. To group objects together to make it easier to manage them by applying Group Policy Objects (GPOs) to the whole group. You can link GPOs to the OU, and the settings apply to all objects within the OU. For example, you create an OU for contractors who have different security requirements than full-time employees.

Delegation of control. To delegate administrative control of objects within the OU. You can assign management permissions on an OU, thereby delegating control of that OU to an AD DS user or group. For example, you create an OU to manage a satellite office in a different geographical location. Then, you delegate control of the OU to a group.

What is Active Directory Domain Services (AD DS)?

Active Directory Domain Services (AD DS)is a scalable, secure, and manageable infrastructure for user and resource management. AD DS is a Windows Server role that’s installed and hosted on a server known as a domain controller. AD DS uses Lightweight Directory Access Protocol (LDAP) to access, search, and change the directory service. LDAP is a based on the X.500 standard and TCP/IP.  

AD DS provides a centralized system for managing users, computers, and other resources on the network. AD DS features a centralized directory, single sign-on access, integrated security, scalability, and a common management interface.

Powershell – Updating Active Directory Objects Using from a CSV

Below are possible ways to update active directory objects using data contained in a CSV.

Without a CSV:

Get-ADUser Soma.Bright -Properties SamAccountName | Set-ADUser -Replace @{SamAccountName="Bright.Soma"}

Using a CSV with “identity”:

$file=import-csv "AccountInfo.csv"
foreach($dataRecord in $file) {


Get-ADUser -Identity $SamAccountName -Properties EmployeeType | Set-ADUser -Replace @{EmployeeType=$EmployeeType}

Get-ADUser -Identity $sAMAccountName | Set-ADUser -Department $Department

Using a CSV with a “filter”:

Import-module ActiveDirectory 
$userList= Import-Csv '.\List of Users.csv'
foreach ($userin$userList){ Get-ADUser -Filter "SamAccountName -eq '$($user.sAMAccountName)'"-SearchBase "DC=subdomain,DC=company,DC=com"-Properties Company |% { Set-ADUser $_-Replace@{Company = 'Deliveron'} } }If you then wanted to query AD for those users to make sure they updated correctly, you could use the following query using Get-ADUser:foreach ($userin$userList){

Get-ADUser -Filter "SamAccountName -eq '$($user.sAMAccountName)'"-SearchBase "DC=subdomain,DC=company,DC=com"-Properties Company | Select SamAccountName, Name, Company


Updating Multiple values:

 Import-Module ActiveDirectory  

$users = Import-Csv -Path c:\update.csv

foreach ($user in $users) {
Get-ADUser -Filter "employeeID -eq '$($user.employeeID)'" -Properties * -SearchBase "ou=Test,ou=OurUsers,ou=Logins,dc=domain,dc=com" |
Set-ADUser -employeeNumber $($user.employeeNumber) -department $($user.department) -title $($user.title) -office $($ -streetAddress $($user.streetAddress) -City $($user.City) -state $($user.state) -postalCode $($user.postalCode) -OfficePhone $($user.OfficePhone) -mobile $($ -Fax $($user.Fax) -replace @{"extensionAttribute1"=$user.extensionAttribute1; "extensionAttribute2"=$user.extensionAttribute2; "extensionAttribute3"=$user.extensionAttribute3}

For more info please see the below links:

Import-csv to update Active directory users

Update AD from CSV

Powershell – CSV – AD Attribute Update

AD / Import CSV Update Attributes Script

Import Users from a CSV File into Active Directory using PowerShell

To Get a List of AD Users With or Without a “Null”, “ALL”, and “Empty” Values or Attributes Using Powershell

To get a list of AD users with no mail attribute:

get-aduser| where {$_.mail -eq $null}

get-aduser -properties Company -filter {mail -notlike “*”}

get-aduser -properties Company -filter {Company -eq $null}

get-aduser -filter * -properties * | where {($_.mail -eq $null) -and ($_.manager -ne $null)}

get-aduser -filter * -properties * | where {($_.mail -eq $null) -and ($_.manager -ne $null)} | select name

NOTE: Running the opposite commands above will give you a list of the AD users with mail attribute e.g

Get-ADUser -Properties mail -Filter {mail -like ‘*’}

NOTE: The below command will give you an error because you cannot use $null and -eq in a filter parameter in powershell.

get-aduser -properties Company -filter {Company -eq $null}

Also, the below is known to fail:

get-aduser -properties Company -filter {Company -eq “” }

The list of active accounts with e-mail addresses:

Get-ADUser -Filter {(mail -ne “null”) -and (Enabled -eq “true”)} -Properties Surname,GivenName,mail | Select-Object Name,Surname,GivenName,mail | Format-Table

Getting a List of AD Accounts Which Haven’t Been Used Over A Given Period

 Identify recently created user accounts that have not been used to access a web service in 14 days. I’m looking to filter on accounts with a blank LastLogonTimeStamp, and a whenCreated date of -14 days:

$TargetDate = Get-Date -Date (get-date).AddDays(-14)

$SearchBase = “OU=People,DC=my,DC=domain,DC=com”

$Filter = {(whenCreated -lt $TargetDate) -and (-not(lastLogonTimeStamp -like “*”))}

get-ADUser -Filter $Filter -SearchBase $SearchBase | Disable-ADAccount

The users who haven’t changed their passwords in the last 90 days:

$90_Days = (Get-Date).adddays(-90)

Get-ADUser -filter {(passwordlastset -le $90_days)}

To see all users who last logged on before January 1, 2013, you could type:

get-aduser -f * | where {$_.lastlogondate -le “1 January 2013”}

Find Those Inactive Users and Computers:

PS C:\> Import-Module ActiveDirectory

PS C:\> Get-ADUser –filter * | Where { $_.passwordLastSet –lt (Get-Date).AddDays(-365) }

PS C:\> Import-Module ActiveDirectory

PS C:\> Get-ADUser –filter * -prop PasswordLastSet | Where { $_.passwordLastSet –eq $null }