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Okta: SSO authentication for Gmail and Slack

Arseny Zinchenko
DevOps, cloud and infrastructure engineer. Love Linux, OpenSource, and AWS.
Originally published at rtfm.co.ua on ・3 min read

Okta is an Single Sign-On service provider and I’d like to move all our users to the Okta for better management.

The task now will be to create a Gmail mailbox account and Slack community access.

Okta Gmail app

Register a new account, go to the Get started, in the Use single sign-on click on the Add app:

Find Gmail Inbox application:

Leave defaults on the next page:

In this current case, I’m configuring a shared mailbox account access which will be used by various users.

Thus, choose the Users share a single username and password set by administrator type, set the Email type in the в Application username format and configure username and password:

Ready:

Application assignment

In the Assignments, you can specify which application will be available for user/groups.

Chose the All users access here for the mailbox created above:

Check the access – go to the My applications:

Chrome Okta plugin

Install the Okta plugin:

Log in via the browser and your mailbox is available now:

Slack

Similarly to the Gmail application but in contrast to the Gmail account – for the Slack application each user will have to configure login-password by himself.

Add another one App:

Chose its name, in the Domain – specify the Slack’s community name without slack.com, i.e. if your Slack called example.slack.com – then set the only example here_:_

Chose the User sets username and password:

Go to the Applications, click on the Edit:

And set your Slack’s credentials:

Done.

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