Expired Azure credentials

Author published on Thursday, Oct 26, 2017 included in Azure

In case you get this error below, this error is mostly due to outdated Modules or at least in this case the AzureRM module.

Get-LogonHistory: Who was logged on to my server?

Author published on Thursday, Oct 5, 2017 included in Scripts PowerShell Windows Server

Every System Administrator comes into a situation where you want to see who and how many users were logged on to your servers either via Remote Desktop or via script.

Get-PSVersions: Retrieve Powershell version remotely

Author published on Friday, Sep 22, 2017 included in Scripts PowerShell Windows Server Windows

Okay at the end it’s a simple $PSVersion wrapped in an Invoke-Command but hey these simple things are needful in case you need to run it against of 100s of servers and not just locally. With the help of Invoke-Command via WinRM and $PSVersionTable.psversion wrapped in a foreach you can retrieve PowerShell version of your remote computers indifferent if you need to use credentials to run it against a different domain than you currently reside. Just use the below function Get-PSVersions, simple but good.

Resolve-DnsNames: Resolve DNS or IP for multiple Computers

Author published on Sunday, Sep 10, 2017 included in Windows Server Windows

Respective Microsoft’s Technet article regarding Resolve-DnsName I have created a function with the ability to run it against more than only one computer. Resolve-DnsNames performs a DNS name query resolution for the specified name.

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Function Resolve-DnsNames
{
<#
.SYNOPSIS
    Resolves IP or DNS name for one or more computers.

.DESCRIPTION
    Resolves IP or DNS name for one or more computers.

.PARAMETER ComputerName
    A single Computer or an array of computer names. The default is localhost ($env:COMPUTERNAME).

.PARAMETER IPAddress
    Commit IPAddress to resolve.

.PARAMETER Verbose
    Run in Verbose Mode.

.EXAMPLE
    PS C:> Resolve-DnsNames graef.io

    Name                                           Type   TTL   Section    IPAddress
    ----                                           ----   ---   -------    ---------
    graef.io                                       AAAA   86336 Answer     2a01:488:42:1000:50ed:84e8:ff91:1f91
    graef.io                                       A      86336 Answer     80.237.132.232


.EXAMPLE
	PS C:> Resolve-DnsNames 80.237.132.232

    Name                           Type   TTL   Section    NameHost
    ----                           ----   ---   -------    --------
    232.132.237.80.in-addr.arpa    PTR    40292 Answer     graef.io

.EXAMPLE
    PS C:> Resolve-DnsNames -ComputerName (Get-Content C:ServerList.txt)

.LINK

Home


.NOTES
    Author:  Sebastian Gräf
    Email:   sebastian@graef.io
    Date:    September 10, 2017
    PSVer:   2.0/3.0/4.0/5.0
#>

	[Cmdletbinding()]
	Param (
		[Parameter(
				   Mandatory = $false,
				   ValueFromPipeline = $true,
				   ValueFromPipelineByPropertyName = $true)]
		[string[]]$ComputerName = $Env:COMPUTERNAME
	)

	Begin
	{
		Write-Verbose " [$($MyInvocation.InvocationName)] :: Start Process"
        $ProgressCounter = 0
        $array=@()
	}

	Process
	{
        foreach ($Computer in $ComputerName)
		{
            $ProgressCounter++
			Write-Progress -activity "Running on $Computer" -status "Please wait ..." -PercentComplete (($ProgressCounter / $ComputerName.length) * 100)
				Write-Verbose " [$($MyInvocation.InvocationName)] :: Processing $Computer"
				try
				{
                    $Resolution = Resolve-DnsName $Computer -ErrorAction SilentlyContinue
                    $obj = New-Object PSObject
                    $obj | Add-Member NoteProperty ComputerName ($Computer)
                    $obj | Add-Member NoteProperty Name ($Resolution.Name)
                    $obj | Add-Member NoteProperty Type ($Resolution.Type)
                    $obj | Add-Member NoteProperty TTL ($Resolution.TTL)
                    $obj | Add-Member NoteProperty Section ($Resolution.Section)
                    $obj | Add-Member NoteProperty NameHost ($Resolution.NameHost)
                    $obj | Add-Member NoteProperty IPAddress ($Resolution.IPAddress)
                    $array += $obj

				}
				catch
				{
					Write-Verbose " Host [$Computer] Failed with Error: $($Error[0])"
				}
	    }
        $array | ft
    }
	End
	{
		Write-Verbose " [$($MyInvocation.InvocationName)] :: End Process"
	}
}

References

Resolve-DnsName