In OWA Whats the difference between the “Public or shared computer” and “Private computer” Security options?
The “Public or shared computer” setting has a much shorter timeout (30 minutes) than the “Private computer” setting (24 hours). If there has been no activity between the web client and the server for the duration of the timeout setting (i.e. no mail passing to or from the server), you will be presented with an authentication screen. Once you re-authenticate, you will be able to continue where you were. If you are using OWA from a public computer, you should choose “Public or shared computer”. If you are using it from your own secure computer, the “Private computer” setting is more convenient.
