I would say that informed and reasonable obedience to authority is a virtue. Without obedience, society and everything within it, even at the family level, breaks down.

Simply put, leadership and project planning are completely different skill sets than those utilized by the workers actually carrying out the project. Look at just about any sector as an example. Compare Laying pipe to designing a plumbing system. Compare Tactical combat maneuvers to large scale strategic planning. Ad nauseum, really.

Blindly following orders and treating authority as absolute and not subject to moral judgement of any kind, however, is most definitely a vice.

Soldiers doing their best to accomplish their assigned mission are generally virtuous, at least in this aspect of their character.

Soldiers firing on unarmed civilians due to orders are not.

Blind unquestioning obedience is a subset of obedience, so I would generally classify it as the exception, and obedience as a virtue as the general rule.

It depends on the kind of authority we're talking of;if its good authority whose exercise of powers are legitimate and beneficial definitely obedience otherwise if it's like that of Caesar and Hitler,it's a vice.