functions/user/Get-PSEntraIDUser.ps1

function Get-PSEntraIDUser {
    <#
    .SYNOPSIS
        Get the properties of the specified user.

    .DESCRIPTION
        Get the properties of the specified user.

    .PARAMETER Identity
        UserPrincipalName, Mail or Id of the user attribute populated in tenant/directory.

    .PARAMETER Name
        DisplayName, GivenName, Surname of the user attribute populated in tenant/directory.

    .PARAMETER CompanyName
        CompanyName of the user attribute populated in tenant/directory.

    .PARAMETER Disabled
        Return disabled accounts in tenant/directory.

    .PARAMETER Filter
        Filter expressions of accounts in tenant/directory.

    .PARAMETER AdvancedFilter
        Switch advanced filter for filtering accounts in tenant/directory.

    .PARAMETER All
        Return all accounts in tenant/directory.

    .PARAMETER EnableException
        This parameter disables user-friendly warnings and enables the throwing of exceptions. This is less user friendly,
        but allows catching exceptions in calling scripts.

    .EXAMPLE
        PS C:\> Get-PSEntraIDUser -Identity user1@contoso.com

        Get properties of Azure AD user user1@contoso.com

    .NOTES
        Piping into Select-Object -First N logs a warning that is not a failure:

            WARNING: [<cmdlet>] Failed to: ... | The pipeline has been stopped

        The results are correct and complete. Select-Object stops the pipeline once it
        has what it asked for, and the next write throws PipelineStoppedException -
        normal termination, reported as an error only because the write happens inside a
        protected block. Materialise first if the warning is in the way:

            $items = @(<cmdlet> ...)
            $items | Select-Object -First 3

        or filter server-side with -Filter instead of trimming client-side. Not silenced
        on purpose: the only fix that works is to collect the whole result before
        emitting any of it, which would cost streaming on every read.

#>

    [OutputType('PSMicrosoftEntraID.Users.User')]
    [CmdletBinding(DefaultParameterSetName = 'Identity')]
    param (
        [Parameter(Mandatory = $True, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, ParameterSetName = 'Identity')]
        [Alias("Id", "UserPrincipalName", "Mail")]
        [ValidateUserIdentity()]
        [string[]] $Identity,
        [Parameter(Mandatory = $True, ValueFromPipeline = $false, ValueFromPipelineByPropertyName = $false, ParameterSetName = 'Name')]
        [ValidateNotNullOrEmpty()]
        [string[]] $Name,
        [Parameter(Mandatory = $True, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, ParameterSetName = 'CompanyName')]
        [ValidateNotNullOrEmpty()]
        [string[]] $CompanyName,
        [Parameter(Mandatory = $false, ParameterSetName = 'CompanyName')]
        [Parameter(Mandatory = $false, ParameterSetName = 'All')]
        [ValidateNotNullOrEmpty()]
        [switch] $Disabled,
        [Parameter(Mandatory = $True, ValueFromPipeline = $false, ValueFromPipelineByPropertyName = $false, ParameterSetName = 'Filter')]
        [ValidateNotNullOrEmpty()]
        [string] $Filter,
        [Parameter(Mandatory = $false, ValueFromPipeline = $false, ValueFromPipelineByPropertyName = $false, ParameterSetName = 'Filter')]
        [ValidateNotNullOrEmpty()]
        [switch] $AdvancedFilter,
        [Parameter(Mandatory = $True, ValueFromPipeline = $false, ValueFromPipelineByPropertyName = $false, ParameterSetName = 'All')]
        [ValidateNotNullOrEmpty()]
        [switch] $All,
        [Parameter()]
        [switch] $EnableException
    )

    begin {
        [string] $service = Get-PSFConfigValue -FullName ('{0}.Settings.DefaultService' -f $script:ModuleName)
        Assert-EntraConnection -Service $service -Cmdlet $PSCmdlet
        [hashtable] $query = @{
            '$count'  = 'true'
            '$top'    = Get-PSFConfigValue -FullName ('{0}.Settings.GraphApiQuery.PageSize' -f $script:ModuleName)
            '$select' = ((Get-PSFConfig -Module $script:ModuleName -Name Settings.GraphApiQuery.Select.User).Value -join ',')
        }
        [int] $commandRetryCount = Get-PSFConfigValue -FullName ('{0}.Settings.Command.RetryCount' -f $script:ModuleName)
        [System.TimeSpan] $commandRetryWait = New-TimeSpan -Seconds (Get-PSFConfigValue -FullName ('{0}.Settings.Command.RetryWaitInSeconds' -f $script:ModuleName))
    }

    process {
        switch ($PSCmdlet.ParameterSetName) {
            'Identity' {
                foreach ($user in $Identity) {
                    [hashtable] $mailQuery = @{
                        #'$count' = 'true'
                        '$top'    = Get-PSFConfigValue -FullName ('{0}.Settings.GraphApiQuery.PageSize' -f $script:ModuleName)
                        '$select' = ((Get-PSFConfig -Module $script:ModuleName -Name Settings.GraphApiQuery.Select.User).Value -join ',')
                    }
                    $mailQuery['$Filter'] = ("mail eq '{0}'" -f (ConvertTo-ODataFilterString -Value $user))
                    Invoke-PSFProtectedCommand -ActionString 'User.Get' -ActionStringValues $user -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                        [PSMicrosoftEntraID.Users.User[]] $userMail = ConvertFrom-RestUser -InputObject (Invoke-EntraRequest -Service $service -Path ('users') -Query $mailQuery -Method Get  -ErrorAction Stop)
                        if (-not([object]::Equals($userMail, $null))) {
                            [string] $userId = $userMail[0].Id

                        }
                        else {
                            [string] $userId = $user
                        }
                        # The identity is escaped because it lands in the URL PATH, and a
                        # guest's userPrincipalName always contains '#EXT#'. Unescaped,
                        # '#' starts the URI fragment and everything after it is silently
                        # dropped - Graph then sees a truncated path and answers 400/404.
                        # Reading any guest by UPN failed on exactly this.
                        ConvertFrom-RestUser -InputObject (Invoke-EntraRequest -Service $service -Path ('users/{0}' -f [uri]::EscapeDataString($userId)) -Query $query -Method Get  -ErrorAction Stop)
                    } -EnableException:$EnableException -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait -WhatIf:$false
                    if (Test-PSFFunctionInterrupt) { return }
                }
            }
            'Name' {
                foreach ($user in $Name) {
                    $userEscaped = ConvertTo-ODataFilterString -Value $User
                    $query['$Filter'] = ("startswith(displayName,'{0}') or startswith(givenName,'{0}') or startswith(surName,'{0}')" -f $userEscaped)
                    Invoke-PSFProtectedCommand -ActionString 'User.Name' -ActionStringValues $user -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                        ConvertFrom-RestUser -InputObject (Invoke-EntraRequest -Service $service -Path ('users') -Query $query -Method Get  -ErrorAction Stop)
                    } -EnableException:$EnableException -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait -WhatIf:$false
                    if (Test-PSFFunctionInterrupt) { return }
                }
            }
            'Filter' {
                $query['$Filter'] = $Filter
                if ($AdvancedFilter.IsPresent) {
                    [hashtable] $header = @{}
                    $header['ConsistencyLevel'] = 'eventual'
                    Invoke-PSFProtectedCommand -ActionString 'User.Filter' -ActionStringValues $Filter -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                        ConvertFrom-RestUser -InputObject (Invoke-EntraRequest -Service $service -Path ('users') -Query $query -Method Get -Header $header  -ErrorAction Stop)
                    } -EnableException:$EnableException -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait -WhatIf:$false
                    if (Test-PSFFunctionInterrupt) { return }
                }
                else {
                    Invoke-PSFProtectedCommand -ActionString 'User.Filter' -ActionStringValues $Filter -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                        ConvertFrom-RestUser -InputObject (Invoke-EntraRequest -Service $service -Path ('users') -Query $query -Method Get  -ErrorAction Stop)
                    } -EnableException:$EnableException -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait -WhatIf:$false
                    if (Test-PSFFunctionInterrupt) { return }
                }
            }
            'CompanyName' {
                [hashtable] $header = @{}
                $header['ConsistencyLevel'] = 'eventual'
                [string] $companyNameList = ($CompanyName | ForEach-Object { "'{0}'" -f (ConvertTo-ODataFilterString -Value $_) } | Join-String -Separator ',')
                if ($Disabled.IsPresent) {
                    $query['$Filter'] = 'companyName in ({0}) and accountEnabled eq false' -f $companyNameList
                    Invoke-PSFProtectedCommand -ActionString 'User.Filter' -ActionStringValues ('companyName in ({0}) and accountEnabled eq false' -f $companyNameList) -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                        ConvertFrom-RestUser -InputObject (Invoke-EntraRequest -Service $service -Path ('users') -Header $header -Query $query -Method Get  -ErrorAction Stop)
                    } -EnableException:$EnableException -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait -WhatIf:$false
                    if (Test-PSFFunctionInterrupt) { return }
                }
                else {
                    $query['$Filter'] = 'companyName in ({0})' -f $companyNameList
                    Invoke-PSFProtectedCommand -ActionString 'User.Filter' -ActionStringValues ('companyName in ({0})' -f $companyNameList) -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                        ConvertFrom-RestUser -InputObject (Invoke-EntraRequest -Service $service -Path ('users') -Header $header -Query $query -Method Get  -ErrorAction Stop)
                    } -EnableException:$EnableException -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait -WhatIf:$false
                    if (Test-PSFFunctionInterrupt) { return }
                }
            }
            'All' {
                if ($All.IsPresent) {
                    if ($Disabled.IsPresent) {
                        [hashtable] $header = @{}
                        $header['ConsistencyLevel'] = 'eventual'
                        $query['$Filter'] = "accountEnabled eq false"
                        Invoke-PSFProtectedCommand -ActionString 'User.Filter' -ActionStringValues 'accountEnabled eq false' -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                            ConvertFrom-RestUser -InputObject (Invoke-EntraRequest -Service $service -Path ('users') -Header $header -Query $query -Method Get  -ErrorAction Stop)
                        } -EnableException:$EnableException -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait -WhatIf:$false
                        if (Test-PSFFunctionInterrupt) { return }
                    }
                    else {
                        Invoke-PSFProtectedCommand -ActionString 'User.List' -ActionStringValues 'All' -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                            ConvertFrom-RestUser -InputObject (Invoke-EntraRequest -Service $service -Path ('users') -Query $query -Method Get  -ErrorAction Stop)
                        } -EnableException:$EnableException -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait -WhatIf:$false
                        if (Test-PSFFunctionInterrupt) { return }
                    }
                }
            }
        }
    }
    end {}
}