Modifying a subscription
You can modify the details of an EventHub Subscriber channel.
You can modify all fields for Custom event hub subscriptions. For Standard event hub subscriptions, you can only modify the Channel Process Type field.
You can also use the Fast Track and Slow Track features to identify whether the Event Hub subscriptions are processed or received in IEC over other subscriptions.
When a subscription is ordered, you can move the subscription to Fast Track or Slow Track. The variation ID is carried over to the target channel if it is higher than the target's current variation ID. Otherwise, the target variation ID remains the same.
Note: Switching to another channel type reloads both old and new channels associated with the subscription.