Store Powershell Password

Question

Hello

I need to read/store a password in the Adaxes System.

I have created this script:

Import-Module Adaxes

$exchangeServer = "exchangeserver.CH" # TODO: modify me

# Get the name of the domain of the master account
#$linkedDomainName = $Context.GetObjectDomain("%distinguishedName%")
$linkedDomainName = "linked.ch"

# Get domain controlers in the domain of the master account
$linkedDomainControler = "dclinked.linked.ch"

# Get credentials for the resource domain
$exchangeAdminName = $Context.RunAs.UserName
$exchangeAdminPassword = ConvertTo-SecureString -AsPlainText -Force -String $Context.RunAs.Password

$credential = New-Object -TypeName System.Management.Automation.PSCredential($exchangeAdminName, $exchangeAdminPassword)

# Connect to Exchange Server in the resource domain and create linked mailbox
$session = New-PSSession –ConfigurationName Microsoft.Exchange –ConnectionUri "http://$exchangeServer/PowerShell/" -Credential $credential
Import-PSSession $session -AllowClobber -DisableNameChecking

    $Context.LogMessage($linkedDomainControler, "Information")
    try
    {

            $linkedReadUser = "linked\adaxesread"
            $linkedReadPassword = ConvertTo-SecureString -AsPlainText -Force -String "supersecurepassword."

            $credentialExploit = New-Object -TypeName System.Management.Automation.PSCredential($linkedReadUser, $linkedReadPassword)

           set-User -Identity '%sAMAccountName%' -LinkedDomainController $linkedDomainControler -LinkedMasterAccount "linked\%username%" -UserPrincipalName "%username%@linked.ch" -LinkedCredential $credentialExploit
    }
    catch
    {
        $Context.LogMessage($linkedDomainControler.DNSHostName + ":" + $_.Exception.Message, "Warning")
        continue
    }

Remove-PSSession $session

The problem is the line
$linkedReadPassword = ConvertTo-SecureString -AsPlainText -Force -String "supersecurepassword."

I prefer that I can store the password secure in Adaxes and read this information for the script.
Like in this line
$exchangeAdminPassword = ConvertTo-SecureString -AsPlainText -Force -String $Context.RunAs.Password

My script do only set the LinkedMasterAccount in the Resource Forest to activate a Linked mailbox in Exchange.
I must run the script unter a user from the Resource Forest who have access to Exchange.
The command set-user need a user/pwd from the Linked Domain as parameter.

Thank you for your help.

Regards
Gustav