Fix duplicate accounts

When someone has more than one account on a workspace, they have duplicate accounts. Duplicate accounts typically occur by mistake on workspaces that require members to use single sign-on (SSO). For example, if a member enters an email alias to sign in to Slack, or enters a typo, this will create a new account. If this happens, Workspace Owners or Org Owners can fix duplicate accounts for members.

Note: On the free plan, duplicate accounts will need to be resolved by the impacted member. Members can fix the duplicate account by following the steps to change your email address on both accounts.

Fix duplicate accounts

Pro and Business+ plans 

Enterprise Grid plan

Workspace Owners can fix duplicate accounts for members. If your workspace doesn’t use SSO authentication, skip to Step 2: Update a member’s email address.

Step 1: Allow email addresses to be changed

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Workspace settings.
3. Click Authentication. 
4. Beside SAML or Google Authentication Settings, click Change Settings.
5. To the right of Settings, click Expand.
6. Turn on Allow users to change their email address.
7. Click Save Configuration.

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Step 2: Update a member’s email address

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Manage members.
3. For the account you’d like to change, click the email address and enter a new one. (Any email address will do — you’ll simply need to release the desired email address from the duplicate account.)
4. Once that's done, you can deactivate the duplicate account.
5. Next, find the original account. Click the email address and replace it with the one you released.
6. Click the  three dots icon to the right of the member’s name and select Send SSO binding email. The member will receive an email instructing them how to bind and authenticate their account.

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Step 3: Change workspace settings back

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Workspace settings.
3. Click Authentication. 
4. Beside SAML or Google Authentication Settings, click Change Settings.
5. To the right of Settings, click Expand.
6. Turn off Allow users to change their email address.
7. Click Save Configuration.

Org Owners can fix duplicate accounts for members:

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings, then click Organization settings.
3. Click  People in the left sidebar, then select Members. 
4. Find the member’s duplicate account and click on the account name.
5. Click Manage in the top-right corner, then select Edit Profile.
6. Change the email address on the account to a different one. (Any email address will do — you’ll simply need to release the desired email address from the duplicate account.)
7. Once that's done, you can deactivate the duplicate account.
8. Next, find the original account and replace the email address with the one you released.
9. Click Manage in the top-right corner, then select Send SSO rebind email. The member will receive an email instructing them how to bind and authenticate their account.

Prevent duplicate accounts

To prevent duplicate accounts from being created, ensure that everyone uses the correct email address that is tied to their account. Here are some tips to keep in mind:

• Make sure members use the correct email address to sign in to Slack. If a member's email address is [e-mail], but they use the alias [e-mail] instead, they'll end up with a duplicate account.
• If you're using an identity provider (IDP), make sure your identifier is set to a unique and unchanging value, like an employee number, for example. Setting your identifier to a value like an email address may result in members creating duplicate accounts.

Who can use this feature?

• Workspace Owners and Org Owners
• Available on paid plans