[Dovecot] what exactly does outlook-idle workaround?

[Jonathan Salomon]

Hi,

Can anyone tell me what the 'client_workarounds = outlook-idle' directive
exactly does? I have enabled it in my /etc/dovecot.conf, but the problem
that I think it should solve still exsits. That is that after being IDLE
for more than half an hour Dovecot will disconnect Outlook but Outlook
never connects back. Therefore users receive new mail, but they don't get
notified unless they press send/receive.

So what does the workaround do? And how can I solve the problem?

Thanks!
Jonathan