My boss is new. She's been promoted less than 3 months ago, after my previous boss quit the company. My old boss learned to trust me. She learned that, when I say "this is not our problem", it's not, and she has to go and stand her ground against the area that's actually responsible for the problem.
Just now we had one of those situations with our new boss. Our software wasn't working properly, and I told her to escalate the ticket to Support. We're Development. It's a known problem, and it's a known fix. The software was working, but from one day to another, it stopped working. Support said "nothing changed, we only moved the backend from one server to another". I knew right away they did that, because the problem is that MS DTC service isn't enabled by default, and they forget to turn it on.
The ticket spent a week going back and forth until my boss asked me to join a meeting with support. They said "uh, if it were X problem, then we will have the same problem in window Y". Someone at the meeting said "OK, let's see that". So they did, and indeed, the error popped up. The fix was easy, it was already documented, and it happens every time they change servers (third time so far).
The problem is, my boss had me involved in this, after I told her it was not our problem. We spent 1 hour with another team doing their job. My previous boss trusted me enough to go and say what I told her to say in front of management, because when I assure her I'm right, it's because I am. Most often I don't tell her that, because if I'm 99% sure, I'm not going to send her to do that. But if I'm 100% sure, it's because I tested it and I know.
This new boss doesn't have this level of trust in me.
Should I just wait for this "bond" of trust to grow, or should I approach her more explicity about this situation?
From a comment by OP: I should clarify: I didn't literally tell her "this isn't our problem", I actually told her what the problem was, how we solved it in the past, and who to escalate the ticket to. This was actually the person, in the meeting, that asked to see the problem exactly. And when she saw it, she knew what had to be done.