You can stay logged on to the MLS for an unlimited period of time, as long as you are actively working in the system. If you stop working in the MLS (i.e., stop clicking any buttons) but do not log off, the system will automatically log you off one hour later. So each time you click a Submit button, the one-hour time period is extended.
NOTE: Your browser may be set up to automatically disconnect your Internet connection after a specific number of minutes of inactivity. If this happens, your computer may appear to be still logged on to the MLS, although the software does not function. Please check your Internet connection, reconnect, and log on to the MLS again. (If you do this within an hour, you may receive a warning that your agent ID is already logged on to the system, so just click "Continue" to start a new logon session.)
See also
Logging off the MLS