When a user authenticates with IMS, the length of time that the token issued to the application is valid varies.
For sessions which originate inside of a web browser, the token is valid for one hour of inactivity and 24 hours of activity. Note that this token is issued to the browser, not a specific tab or window. However, each tab or window each tracks inactivity separately at the moment, so if any tab or window expires due to inactivity, all of the tabs and windows would be expired and need to re-authenticate.
For sessions *** originate inside the CONNECTION Client, the token is valid for the next seven days. After six days, the CONNECTION Client will automatically attempt to get you a fresh token; you'd only need to sign in when that refresh fails.
Sessions issued between web browsers and CONNECTION Client are not shared. Signing into one does not automatically sign you into the other.