How-to: Active Directory / LDAP User Attributes.

A list of all the user attributes with maximum data sizes, including Microsoft Exchange Extensions.

Description	LDAP provider property	Alias	WinNT provider property	LDAP Max Length	Multi- Valued ?	LDAP Property Method
Account expires end of (date)	accountExpires			Date		AccountExpirationdate
Country/region (ISO 4217)	c	co, countryCode		Predefined values (3 digit int returns String)
Name	cn			String(64)
Company	company			String(64)
Department	department			String(64)
Description	description		description	String(1024)
Display name	displayName	FullName	fullName	String(256)		FullName
Fax	facsimileTelephoneNumber			String(64)		FaxNumber
First name	givenName	FirstName		String(64)		FirstName
Home folder, local path	homeDirectory		homeDirectory	String
Home folder, Connect, To:	homeDirectory		homeDirectory	String
Home folder, Connect, Drive	homeDrive		homeDirDrive	Predefined values (String)
Home	homePhone			String(64)		TelephoneHome
Notes	info			String(1024)
Initials	initials			String(6)
IP phone	ipPhone			String(64)
City	l	City		String(128)
Logon Hours…	logonHours			Binary		LoginHours
E-mail	mail	EmailAddress		String(256)		EmailAddress
Manager	manager			Distinguished Name
Mobile	mobile			String(64)		TelephoneMobile
Other Fax numbers	otherFacsimileTelephoneNumber			String(64)	Yes
Other Home phone numbers	otherHomePhone			String(64)	Yes
Other IP phone numbers	otherIpPhone			String	Yes
Other Mobile numbers	otherMobile			String(64)	Yes
Other Pager numbers	otherPager			String(64)	Yes
Other Telephone numbers	otherTelephone			String(64)	Yes
Pager	pager			String(64)		TelephonePager
Office	physicalDeliveryOfficeName			String(128)		OfficeLocations
Zip/Postal Code	postalCode			String(40)
P.O. Box	postOfficeBox			String(40)
User Profile path	profilePath		profile	String
User must change password at next logon	pwdLastSet			Boolean
pre-Windows 2000 logon name	sAMAccountName		name	String(256)
Logon script	scriptPath		loginScript	String		LoginScript
Last name	sn	LastName		String(64)		LastName
State/province	st			String(128)
Street	streetAddress			String(1024)
Telephone number	telephoneNumber			String(64)
Title (Job Title)	title			String(128)
Other Web pages	url			Multi-String(2048)	Yes
Account is Disabled	UserAccountControl flag (AccountDisabled/0x0002)			Boolean		AccountDisabled
User cannot change password	UserAccountControl flag To set this: Modify the ACE			Boolean
Password never expires	UserAccountControl flag (DONT_EXPIRE_PASSWORD/0x10000)			Boolean
Store password using reversible encryption	UserAccountControl flag			Boolean
User logon name	userPrincipalName			String(1024)
Logon On To… (Logon Workstations)	userWorkstations			String(1024)	Yes	LoginWorkstations
Web page	wWWHomePage			String(2048)		HomePage
MS Exchange extensions	ExtensionAttribute1			String(1024)
MS Exchange extensions	ExtensionAttribute2			String(1024)
MS Exchange extensions	ExtensionAttribute...			String(1024)
MS Exchange extensions	ExtensionAttribute14			String(1024)
MS Exchange extensions	ExtensionAttribute15			String(1024)
MS Exchange extensions 2010	ExtensionCustomAttribute1				Yes
MS Exchange extensions 2010	ExtensionCustomAttribute2				Yes
MS Exchange extensions 2010	ExtensionCustomAttribute3				Yes
MS Exchange extensions 2010	ExtensionCustomAttribute4				Yes
MS Exchange extensions 2010	ExtensionCustomAttribute5				Yes

The Microsoft Exchange attributes aren't used by any Exchange components.
They can be used to store additional data in Active Directory without having to extend the Active Directory schema.

Lightweight Directory Access Protocol (LDAP) queries

Some basic examples of LDAP queries. Each entire LDAP statement must be encompassed in a set of parentheses( ).

Syntax
      =  (EQUAL TO - The attribute must be equal to a certain value to be true.)
         e.g. find all objects that have the first name of Alice
         (givenName=Alice)

      &  (logical AND - More than one condition must be true.) 
         e.g. find all of the people that have the first name of Alice and live in Venice:
         (&(givenName=Alice)(l=Venice))

      !  (logical NOT - Exclude objects with a certain attribute.) 
         e.g. find all objects except those with the first name of Alice:
         (!givenName=Alice)

      *  (wildcard - match anything)
         e.g. find all objects that have a value (any value) for title
         (title=*)
         find a given name that starts with Al
         (givenName=Al*)

      |  (Logical OR - either comdition must be true)
         e.g. find all objects that are in Venice or in Milan:
         (|(l=Venice)(l=Milan))

This LDAP query syntax can be combined for more complex questions
Find all objects that are in Venice or Milan, and that have the first name of Alice:

   (&(givenName=Alice)(|(l=Venice)(l=Milan)))

The ! operator in conjunction with the wildcard operator will look for objects where that attribute is not set to anything.

“We learn more by looking for the answer to a question and not finding it than we do from learning the answer itself” ~ Lloyd Alexander

Related PowerShell Cmdlets:

Get-adGroup - Get one or more AD groups.
Get-adUser - Get one or more AD users.
ComputerInfo / UserInfo - Active Directory Users and Computers - custom search.
CSVDE / LDIFDE - Create, modify or delete directory objects.