Read/Reply to texts from extension user account

We have two secretaries in our office whose responsibilities vary, but they both need the ability to read and reply to texts that come into the office on the SAME main office line number. It appears only one user is allowed this ability. Is there a way to make it so users on separate extensions can read and reply to SMS on the same main office phone number? I know we could have one log in to the other user on her cell phone, and the desktop app on her computer for the calls to route properly, but the reason we switched to RingCentral was to get away from our employees having to use their personal cell phones for company work.