Configure Office 365 Domain

Registering Domains in Office 365

Before you can configure usersIn Okta literature, we generally refer to "users" as the people who serve as Okta administrators. When we refer to "end users" we are generally referring to the people who the administrators serve. That is, those who use Okta chiclets to access their apps, but have no administrative control. for federated authentication with Office 365, you need to add a domainA domain is an attribute of an Okta organization. Okta uses a fully-qualified domain name, meaning it always includes the top-level domain (.com, .eu, etc.), but does not include the protocol (https).. By default, when you create your Office 365 subscription, Microsoft gives you a default domain in the format yourtenant.onmicrosoft.com. Users with a UPN that resolves to this domain (i.e. bill.smith@yourtenant.onmicrosoft.com) cannot be federated, therefore you need to add another domain.

You can add a domain through the Office 365 portal interface or by using PowerShell. The Microsoft guide provides instructions on how to add a domain. If you plan to use Okta’s Office 365 integration for provisioning new accounts, and your users in Active Directory do not have a username that reflects the domains you wish to use in Office 365, then refer to the sections About Universal Directory.

Important: When using the web interface to add DNS domains, after initial verification, Office 365 asks if you want to update your users that use the default vanity domain to usernames on the new domain you are adding.

If you are setting up the domain for the first time in Office 365 and the only user is the adminAn abbreviation of administrator. This is the individual(s) who have access to the Okta Administrator Dashboard. They control the provisioning and deprovisioning of end users, the assigning of apps, the resetting of passwords, and the overall end user experience. Only administrators have the Administration button on the upper right side of the My Applications page. user for that tenant, do NOT change their username to one that is in the new domain. This will cause problems later when you attempt to setup federation to Okta. Keep your admin account on the yourtenant.onmicrosoft.com domain.

After adding domain, Office 365 will ask if you want to add new user accounts. Continue and select the option to skip the step again.

Then, set the domain purpose and let Office 365 configure your domain if you intend to use Exchange or Skype for Business services.

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