Monday, October 26, 2020

Convert ImmutableID to Hex for AD

To get the immutableID value from a user (should be able to do similar with Get-MSOLUser if preferred):

$id = (Get-AzureADUser -ObjectId

To convert that ID to hex for entry: 

$hex=([system.convert]::FromBase64String("$id") | ForEach-Object ToString X2) -join ' '

To view the value in $hex:


The immutable id will be a value something like: fhG+Kox7LkaYwSIf6s6UFA==

The hex for that one is: 7E 11 BE 2A 8C 7B 2E 46 98 C1 22 1F EA CE 94 14

The hex value can be entered into the ms-DS-ConsistencyGUID attribute of the user object.

And converting from objectGUID to ImmutableID:

$immutableID = [system.convert]::ToBase64String(([GUID]($u.ObjectGUID)).tobytearray())

And converting ImmutableID to GUID:  

$objectGUID = [Guid]([Convert]::FromBase64String($ImmutableID))
UPDATE: I've created a set of functions that you can use for conversions at

Wednesday, October 7, 2020

Install-Module Fails without TLS 1.2

I've run into problems with Windows Server where the Install-Module cmdlet generate errors and won't download from the PowerShell  repository on the internet. To fix this you need to enable TLS 1.2 for PowerShell.

WARNING: Unable to resolve package source ''.
PackageManagement\Install-Package : No match was found for the specified search
criteria and module name 'xxxxxxxxx'. Try Get-PSRepository to see all available 
registered module repositories.

To do this permanently for .NET 4 and up, set two registry keys for 64-bit and 32-bit .NET Framework:

Set-ItemProperty -Path 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\.NetFramework\v4.0.30319'-Name 'SchUseStrongCrypto' -Value '1' -Type DWord
Set-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\.NetFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord

If you need to do a quick temporary fix because you can't update the registry then use this:

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

The temporary fix is only for the current PowerShell prompt.