When a subscription is switched from one Service Plan to another, PBA uses the following algorithm to calculate new resource limits:
- Any additional amount of the resource remains as an additional amount of the resource
- The included amount of the resource is updated to "Included Amount" in the new plan
- Resource prices are updated to prices from the new plan
See examples below.
Example #1
The customer has a subscription based on Service Plan A with five included mailboxes. The customer purchases two additional mailboxes, so now they have seven mailboxes.
The customer switches to Service Plan B with only two included mailboxes.
Result: The customer has a subscription based on Service Plan B with two included mailboxes, plus two additional mailboxes; the total amount of mailboxes in the customer's subscription after the plan switch is four.
In the case of a POA-based subscription, the plan switch may fail if the current resource usage in POA is higher than the new limit PBA tries to set.
Example #2
The customer has a subscription based on Service Plan A with five included mailboxes. The customer purchases two additional mailboxes, so now they have seven mailboxes.
The customer switches to Service Plan B with 50 included mailboxes.
Result: The customer has a subscription based on Service Plan B with 50 included mailboxes, plus two additional mailboxes; the total amount of mailboxes in the customer's subscription after the plan switch is 52.