How to count SLA backwards from due date?

[Kerli Loopman]

I have some issues that are created long time before they really need action. They all have due dates when they need to be done. Is it possible to set the SLA so it will start counting the time XX hours before due date? 

For example:

Issue that is created in 21th of July: I need need account in 10th October. 

SLA says that this type of issues need to be resolved for example in 8hrs so i would like the SLA to start counting 9th october - 8hrs before due date. 

[Alex Koxaras _Relational_]

Hi @Kerli Loopman 

I'm not sure you can do that out of the box. Perhaps with an app like Time to SLA this would be achievable.