The problems is that the company have 2 sites and different support groups for different levels but still level 1 + level 2 needs to work on the same support case.

What they want to do is that level One sends the support case to level 2 (Read support group one an two in same site) and then THECS assigned to support group 2 can start working with the case, but still Level one may need to view the support-case and also work with it.

So the question is how do I set it up. Can a support-case be shared between different groups?