How to resend messages when one client disconnect suddenly？

hi admin,

We face a problem, hopes you can help us.

When two users(AB) chat to each other, A disconnect suddenly, Ejabberd server displayed A is also online, now, the messages from B to A will disappear, neither on server or A client, but B did not know this.

Is there some way Ejabberd server can check the message status and resend the messages? or keep the messages as offline message in above condition.

thanks,

yk5515