Error: "OAuth Error: team_not_authorized" attempting to activate the slack securlet.
Verify the Slack Account is Enterprise level.
To view which Slack account the customer may have:
1. Open Slack console. Click on Account and Profile on the left side.
2. Then click on Plans on the top Right. Click on Compare Plans
3. You must have "Slack Enterprise Grid" or "Enterprise Select" to activate Slack Securlet in CloudSOC
Upgraded the account to enterprise-level and verify all other prerequisites are met.
Tech Doc provides prerequisites including the different versions of Slack that are supported.