Obtain display name with spaces from powershell or cmd - AzuredAD only - powershell

Question

I am try to pull just the display name (first and last name) from cmd or powershell. (AzureAD - not on-prem AD)
I have gotten a couple of different commands but all of them keep the name together.
Examples:
$env:UserName = jatonjustice
[System.Security.Principal.WindowsIdentity]::GetCurrent().Name = azureAD\jatonjustice
I am trying to find a way where the result has the first and last name separated or maybe just the first and just the last name as an alternate idea.(Like: `Jaton Justice') I can't parse it myself as I don't know what the display name will be upfront. (AzureAD - not on-prem AD)
Any ideas for this?
research:
How do I get the current username in Windows PowerShell?
How to get an Azure Active Directory username in Windows Powershell?
Thanks

Answer 1

$env:UserName should return SamAccountName, rather than user's name.
'Get-ADUser -Property *' should show you all info about the user you are querying, you should be able to find a property called GivenName and Surname.

Answer 2

$search = [adsisearcher]"(SamAccountName=$env:USERNAME)"
$search.PropertiesToLoad.AddRange(#('givenname','sn'))
$adAccount = $search.FindOne()
$firstName = $adAccount.Properties.givenname
$lastName = $adAccount.Properties.sn
$fullname = "$firstName $lastName"

Answer 3

All you are after is explained and detailed by examples in the PowerShell help files. More on that later.
As for ...
'but all of them keep the name together. Examples:'
...and they are supposed to, by design.
Using those, you are asking for the local logged-on username (SamAccountName, which is a short name defined in the user profile on the localhost and in ADDS/AAD - for the UPN, SamAccountName#DomainName.com) with those, not ADDS/AAD name specifics.
If you want First and last from the locally logged-on user, then you have to have that populated in the account, or you have to ask for it from ADDS/AAD. What is your use case?
If you are on PSv5x and higher there is this module:
# Results
<#
Get-Module -Name '*local*'
ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Binary 1.0.0.0 Microsoft.PowerShell.LocalAccounts {Add-LocalGroupMember, Disable-LocalUser, Enable-LocalUser, Get-LocalGroup...}
#>
You get local user details this way.
Get-LocalUser | Select-Object -Property '*' -First 1
# Results
<#
AccountExpires :
Description : Built-in account for administering the computer/domain
Enabled : False
FullName :
PasswordChangeableDate :
PasswordExpires :
UserMayChangePassword : True
PasswordRequired : True
PasswordLastSet :
LastLogon :
Name : Administrator
SID : S-1-5-21-2047949552-857980807-821054962-500
PrincipalSource : Local
ObjectClass : User
#>
Note that on his local account, Fullname is not populated. So, obviously, you can't use that, nor can you extrapolate from the name/SamAccoutnName property.
So, you can ask for the locally logged on username in a number of ways,...
# Get loggedon users
$env:UserName
[System.Environment]::UserName
[System.Security.Principal.WindowsIdentity]::GetCurrent().Name
(Invoke-CimMethod -InputObject $(
Get-CimInstance Win32_Process -Filter "name = 'explorer.exe'"
) -MethodName GetOwner).User
Get-WmiObject Win32_Process -Filter "name='explorer.exe'" |
Select Name, #{
Name = 'UserName'
Expression = {"$($PSItem.GetOwner().Domain)\$($PSItem.GetOwner().User)"}
} |
Sort-Object UserName, Name
(Get-Process -Name 'explorer' -IncludeUserName).UserName
(
Get-WMIObject -ClassName Win32_ComputerSystem |
Select-Object -Property Username
).username
[adsisearcher]"(SamAccountName=$env:USERNAME)"
whoami
... then use that Name/SamAccountName to ask ADDS/AAD what the user FullName or whatever you wish is.
If you are on an earlier version, you need to install one of these modules from Microsofts' powershelgallery.com...
Find-Module -Name '*local*'
# Results
<#
Version Name Repository Description
------- ---- ---------- -----------
...
1.6 localaccount PSGallery A Simple module to allow the management of local users and groups on a computer
1.0.0.0 Microsoft.PowerShell.LocalAccounts PSGallery Provides cmdlets to work with local users and local groups
3.0 LocalUserManagement PSGallery a module that performs various local user management functions
...
0.1.1 LocalAccountManagement PSGallery Manage local and remote user accounts and profiles
...
#>
... and do the same thing or use WMI, ADSI, etc.
[adsisearcher]"(SamAccountName=$env:USERNAME)"
# Results
<#
CacheResults : True
ClientTimeout : -00:00:01
PropertyNamesOnly : False
Filter : (SamAccountName=TestUser)
PageSize : 0
PropertiesToLoad : {}
ReferralChasing : External
SearchScope : Subtree
ServerPageTimeLimit : -00:00:01
ServerTimeLimit : -00:00:01
SizeLimit : 0
SearchRoot :
Sort : System.DirectoryServices.SortOption
Asynchronous : False
Tombstone : False
AttributeScopeQuery :
DerefAlias : Never
SecurityMasks : None
ExtendedDN : None
DirectorySynchronization :
VirtualListView :
Site :
Container :
#>
Now, back to my 'read the help file comment.'
Get-ADUser | MS DOcs
https://learn.microsoft.com/en-us/powershell/module/activedirectory/get-aduser?view=windowsserver2019-ps
# Example 3: Get all of the properties for a specified user
Get-ADUser -Identity $env:USERNAME -Properties '*'
# Results
<#
Surname : David
Name : Chew David
UserPrincipalName :
GivenName : David
Enabled : False
SamAccountName : ChewDavid
ObjectClass : user
SID : S-1-5-21-2889043008-4136710315-2444824263-3544
ObjectGUID : e1418d64-096c-4cb0-b903-ebb66562d99d
DistinguishedName : CN=Chew David,OU=NorthAmerica,OU=Sales,OU=UserAccounts,DC=FABRIKAM,DC=COM
#>