I can't delete two users - the three dots are missing

I have two strange looking email addresses in my user list, and I'm not sure what they are for. 

They look like this:  room_(random letters and numbers)@mydomain.org.  It says Zoom Room underneath them, but we do not have any zoom rooms that I am aware of.  I tried to delete them; but the three dots that open the options to delete/unlink/deactivate is missing.  Can someone tell me what's going on?