Cannot Install a Managed Service Account via DevOps - sql

Question

I have a problem i have tried to debug all day now and unable to find a solution.
The Problem
I am trying to automate SQL server builds within a pipeline. I am trying to create and install MSA's. I can add the computer service accounts into AD with the first two commands but when i try to install it on the SQL server, this fails.
My Script so far:
[CmdletBinding()]
param (
[parameter(Mandatory = $true)]
[ValidateNotNullorEmpty()]
[string]$MSA,
[parameter(Mandatory = $true)]
[ValidateNotNullorEmpty()]
[string]$server,
[parameter(Mandatory = $true)]
[ValidateNotNullorEmpty()]
[string]$agentaccount,
[parameter(Mandatory = $true)]
[ValidateNotNullorEmpty()]
[string]$agentpass
)
# Create Creds
[string]$userName = $agentaccount
[string]$userPassword = $agentpass
[SecureString]$secureString = $userPassword | ConvertTo-SecureString -AsPlainText -Force
[PSCredential]$credentialObject = New-Object System.Management.Automation.PSCredential -ArgumentList $userName, $secureString
#Create SVS account and add it to the computer object
$SVS = $MSA + "SVS"
try {
New-ADServiceAccount -name $SVS -Enabled $true -RestrictToSingleComputer -Credential $credentialObject
Add-ADComputerServiceAccount -Identity $server -ServiceAccount $SVS -Credential $credentialObject
Write-Host "$SVS Created"
}
catch {
Write-Host "$SVS already exists"
}
...
#Add the new MSA accounts to the "SQL Server account permissions" group
Add-ADGroupMember "SQL Servers" ($SVS + '$') -Credential $credentialObject
#Create powershell script to install all service accounts onto the required server
#Script Block to run
Add-WindowsFeature RSAT-AD-PowerShell
Import-Module ActiveDirectory -Force
Install-ADServiceAccount -Identity $SVS
...
When i run Install-AdServiceAccount -Identity $SVS the Error output is:
install-adserviceaccount [serviceaccount]
install-adserviceaccount : Cannot install service account. Error Message: 'An unspecified error has occurred'.
At line:1 char:1
+ install-adserviceaccount [serviceaccount]
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : WriteError: ([serviceaccount]:String) [Install-ADServiceAccount], ADException
+ FullyQualifiedErrorId : InstallADServiceAccount:PerformOperation:InstallServiceAcccountFailure,Microsoft.ActiveD
irectory.Management.Commands.InstallADServiceAccount
Tried so far
Ran a powershell task within a Deployment group with the SQL server being a member
Ran a remote target powershell task via an agent to try an invoke the script as an admin.
Created the script locally on the SQL server and invoked the script via a remote target powershell task above too.
** Issue **
When i run this manually on the server when in an Administrator Powershell, the install-adserviceaccount works fine. I guess my question is, is there anyway i can get powershell running as an administrator user from within the pipeline?
Or does anyone have any idea how to solve this.
Thanks.