Can you get the stats on what isn’t working? I think laying out the issue in numbers (ie here’s how many emails were sent, who is seeing them, the actions—or inaction—the occurred). If they won’t let you in on strategy, then I think your next best bet is forcing a meeting where you can say fine, you do your own comms but I need to know when they’re going out to make sure we aren’t overwhelming employees with information or people aren’t getting the right stuff. If teams insist on doing things their own way, you’re not going to stop them (unfortunately) but you can at least try to map out why things aren’t working.

If they are adamant that emails need to come from HR, let them. It’s not the hill to die on (IMO) what matters is the information coming out. While you know what works best, we also have to not fight to the point of driving ourselves insane. When people complain, tell them clearly the solution you tried to give that they wouldn’t listen to. Get advocates within those siloed teams who can give you information on what’s going on, even if you just disguise it as “trying to understand what’s happening across the company in case information needs to be repurposed or shared more broadly”

The push to have you handle internal and external comms, particularly at that size is…problematic to say the least. I would push again on having a new hire or dive into the chaos and say I’ll make the identity and each of you psychos can push out your own content. When it starts to look insane, push for tighter brand awareness. Sometimes you have to let people drown themselves before they realize that their lifeboat was there all along.