How to change the service plan for a subscription in Plesk

Connect to a Plesk server via SSH and apply the following steps:

• to assign a subscription to a service plan with the name 'New Plan', run:

  # plesk bin subscription --switch-subscription example.com -service-plan "New Plan"

• to assign all domains under a particular service plan to another service plan (Linux only):

  Note: Change the values of OLD_SERVICE_PLAN and NEW_SERVICE_PLAN to actual names.

  # export OLD_SERVICE_PLAN="Default Domain"

  # export NEW_SERVICE_PLAN="Unlimited"

  # plesk db -e "select domains.name from domains join Subscriptions join PlansSubscriptions join Templates where domains.id=Subscriptions.object_id and Subscriptions.id=PlansSubscriptions.subscription_id and PlansSubscriptions.plan_id=Templates.id and Templates.name='${OLD_SERVICE_PLAN}'" -Ns | while read dom ; do echo -e "'Processing ${dom}: Changing "${OLD_SERVICE_PLAN}" to "${NEW_SERVICE_PLAN}"..."; plesk bin subscription --switch-subscription ${dom} -service-plan "${NEW_SERVICE_PLAN}"; done