Otto

Hi Glyn, thanks for the quick response. I am wondering if I have to add some extra Add-Type Here is my code and the response: $tenantAPIKey = 'dz52iegnlWe9Mgd1r4xnbYMW9gmzzkWVduUP5abNvqg=' $Certificate = Get-ChildItem -Path Cert:\LocalMachine\my | Where-Object Subject -eq 'CN=12063:RESTAPI4EUD' [uri]$Url = 'https://mdm.airfrance.fr/api/mdm/dep/profiles/search?PageSize=40000' Add-Type -AssemblyName System.Security $bytes = [System.Text.Encoding]::UTF8.GetBytes(($Url.AbsolutePath)) $MemStream = New-Object -TypeName System.Security.Cryptography.Pkcs.ContentInfo -ArgumentList (,$bytes) -ErrorAction Stop $SignedCMS = New-Object -TypeName System.Security.Cryptography.Pkcs.SignedCms -ArgumentList $MemStream,$true -ErrorAction Stop $CMSigner = New-Object -TypeName System.Security.Cryptography.Pkcs.CmsSigner -ArgumentList $Certificate -Property @{IncludeOption = [System.Security.Cryptography.X509Certificates.X509IncludeOption]::EndCertOnly} -ErrorAction Stop $null = $CMSigner.SignedAttributes.Add((New-Object -TypeName System.Security.Cryptography.Pkcs.Pkcs9SigningTime)) $SignedCMS.ComputeSignature($CMSigner) $CMSHeader = '{0}{1}{2}' -f 'CMSURL','`1 ',$([System.Convert]::ToBase64String(($SignedCMS.Encode()))) Write-Output -InputObject $CMSHeader Response 1: CMSURL`1 Response 2: Exception calling "ComputeSignature" with "1" argument(s): "Keyset does not exist " At C:\MDM\Omnissa.ps1:11 char:1 + $SignedCMS.ComputeSignature($CMSigner) + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : CryptographicException Exception calling "Encode" with "0" argument(s): "The CMS message is not signed." At C:\MDM\Omnissa.ps1:12 char:46 + ... URL','`1 ',$([System.Convert]::ToBase64String(($SignedCMS.Encode()))) + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : InvalidOperationException Thanks in advance

Using this code, I get "Get-CMSURLAuthorizationHeader : Exception calling "ComputeSignature" with "1" argument(s): "Keyset does not exist". Please advise