QB Issue Resolution:

I am not sure what you are asking

QB pro is desktop and does not have a subscription. Not supported means you can not use intuit add on services, email, and some other net related things, it will continue to work unless the operating system is changed

QBO is online and does have a subscription, as long as it is paid the account remains active

QB Pro and QBO are two different programs, you use one or the other but not both, they do not communicate

Resolution for Issue 'cancel account – QB 2012 not supported past 5/31/2015' available: Yes (Solved).
Source: Intuit Community forum.

cancel account – QB 2012 not supported past 5/31/2015: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Quickbooks
Quickbooks Repair Pro will resolve it efficiently and affordably. Guaranteed resolution of your issue, or you pay nothing!

Error Recovery for Quickbooks [Canada]
E-Tech is the #1 Quickbooks data migration and Conversion service provider.

Get 50% off Quickbooks Online

Click Here for 50% off!

Additional Support Options: