As I was writing this article, a client called me to discuss this issue. I am not exaggerating. This practice is prevalent – and dangerous.
Bcc’ing your manager on emails may seem innocent. Perhaps you intend to keep your manager informed. But research shows that bbc’ing the boss can corrode trust if teammates find out. To your colleagues, it may seem you are shifty or underhanded. There are other ways to let your manager know what is happening. Forward the relevant email with a note. You can also write a new email with the update instead of forwarding the previous one. This accomplishes the same purpose as bcc’ing, and it doesn’t have the risk of alienating colleagues. These additional steps take extra time, but they'll keep you from destroying relationships.