ADMA credential change to default every time re-enable password sync.

Good day everyone,

Just want to ask is this a correct behavior when every time i ran full password sync powershell as below:

$adConnector  = "xxx.net"
$aadConnector = "xxxxx.onmicrosoft.com - AAD"
Import-Module adsync
$c = Get-ADSyncConnector -Name $adConnector
$p = New-Object Microsoft.IdentityManagement.PowerShell.ObjectModel.ConfigurationParameter "Microsoft.Synchronize.ForceFullPasswordSync", String, ConnectorGlobal, $null, $null, $null
$p.Value = 1
$c.GlobalParameters.Remove($p.Name)
$c.GlobalParameters.Add($p)
$c = Add-ADSyncConnector -Connector $c
Set-ADSyncAADPasswordSyncConfiguration -SourceConnector $adConnector -TargetConnector $aadConnector -Enable $false
Set-ADSyncAADPasswordSyncConfiguration -SourceConnector $adConnector -TargetConnector $aadConnector -Enable $true

and then my ADMA credential will goes back to my default forest credentials when i check on miisclient. 

Thanks in advance.