Slack: "This person is already in your workspace, but their account is deactivated" Error

Environment

U-M Slack

Issue

When attempting to add a person to a Slack workspace or channel, Slack may return one of the following errors:

Couldn't invite 1 person to channel_name
This person is already in your workspace, but their account is deactivated.

OR

Invitation didn't send. This person has a deactivated account for your organization.

Resolution

This error occurs when trying to invite a user to a Slack channel or workspace, and the user has left the workspace the channel is in, or had their account deactivated.

• First, confirm whether they are still eligible for a U-M account. If they are, their account may still be active, but they have left/been removed from the workspace. You can proceed to review the next steps below. Ineligible users could still be added to a workspace or channel as a single-channel guest.
• If the channel was created in the "Maize & Blue" workspace, then the user will need to rejoin the workspace.
  • They can do so by going to https://slack.umich.edu/ and joining the workspace again.
• If the channel was created in a private workspace, the workspace admin should reactivate their account from the workspace admin settings.
  • They can reactivate accounts by clicking the ellipsis (...) and selecting "Add to workspace" per the information at https://slack.com/help/articles/360002061747-Reactivate-a-members-account#enterprise-grid-plan-1

Additional Information

Need additional information or assistance? Contact the ITS Service Center.