1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Workspace settings.
3. Click on Authentication. 
4. Next to Two-factor authentication for your workspace (2FA), click Expand.
5. Click Enable 2FA for your workspace. If you like, click Require an authenticator app to prevent people from using SMS for 2FA.
6. Click Activate two-factor authentication. Members will get an email and Slackbot message to help them to set up authentication. 
   
   People who don’t set up 2FA within 24 hours will be signed out of Slack and prompted to set up 2FA before they can sign in again. New members will be required to set up 2FA before creating an account and signing in to Slack.

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Organisation settings.
3. Select  Security from the left-hand sidebar, then click Security settings.
4. To the right of Two-factor authentication for email sign-in click Enable. 
5. If you like, click Require an authenticator app to prevent members from using SMS for 2FA.
6. When you’re ready, click Enable. Members will get an email and a Slackbot message to help them to set up authentication.
   
   People who don’t set up 2FA within 24 hours will be signed out of Slack and prompted to set up 2FA before they can sign in again. New members will be required to set up 2FA before signing in to Slack.

Workspace owners and admins can see which members have 2FA set up:

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Manage members.
3. Select Filters in the top right.
4. Below Authentication, tick the box next to Two-factor (2FA).

Workspace owners and admins of workspaces in an Enterprise Grid org can see which of their members have 2FA set up:

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Manage members.
3. Select Filters in the top right.
4. Below Authentication, tick the box next to Two-factor (2FA).

Note: You can only see who has 2FA enabled at the workspace level at this time.

If a member gets locked out, workspace owners and admins can temporarily turn off 2FA for that person. On their next sign-in attempt, they'll be prompted to set up 2FA again. Here's how to turn off 2FA for a member:

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Manage members.
3. Click on the  three dots icon to the right of the member's name.
4. Choose Disable 2FA.

Note: Only the workspace primary owner can turn off 2FA for workspace owners. Only workspace owners can turn off 2FA for workspace admins.

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Manage members.
3. Click on the  three dots icon to the right of the member's name.
4. Choose Disable 2FA.

What to expect

• Workspace owners must set up 2FA for themselves to keep their backup password secure. 
• Guests must set up 2FA if they are not required to use SSO. 
• On workspaces where SSO is optional, members can use SSO or their email address and password to sign in to Slack. These members will also be notified when workspace-wide 2FA is turned on.
• 2FA in Slack will be turned off when a member connects or binds their SSO account.

What to expect

• Org owners must set up 2FA for themselves to keep their backup password secure.
• Members and guests must set up 2FA if they are not required to use SSO.