WORKAROUND
Use the Active Roles Management Shell to configure the administration service.
Example:
$svcaccount = Get-Credential
$dbcreds = Get-Credential
New-ARService -DatabaseServer sqlcluster -DatabaseName ActiveRoles73 -DatabaseCredential $dbcreds -MHDatabaseServer sqlcluster -MHDatabaseName ActiveRoles73_MH -MHDatabaseCredential $dbcreds -ServiceAccountCredential $svcaccount -DSAdministrators "HOME\ARadmins"
STATUS
Defect ID 113877 has been logged and will be fixed in a future release of Active Roles.