Overview
Setting a session duration ensures members are periodically required to sign back in to Slack, reducing the risk of unauthorized access from unattended or compromised devices. Members can be warned before their session expires to minimize disruption.
Prerequisites
Workspace Owner, Workspace Admin, Org Owner, or Org Admin access in Slack
Available on all Slack plans
Instructions
Free, Pro, and Business+ plans
From your desktop, click Admin in the sidebar
Select Workspace settings from the menu, then click Security
Click Edit next to Desktop session duration or Mobile session duration
Choose to sign members out whenever they close Slack or after a set period of time
Click Save
Enterprise plans
From your desktop, click your organization name in the sidebar
Hover over Tools & settings, then click Organization settings
From the left sidebar, click Security, then select Security settings
Click Edit next to Desktop session duration or Mobile session duration
Choose to sign members out whenever they close Slack or after a set period of time
Click Save
Note: Members will receive a warning two hours before their session expires and a final reminder 15 minutes before being signed out. Session expirations are applied gradually after the setting is changed — not all members will be signed out immediately.