MattD.37819 (Customer) asked a question.
We have 2 domains we use across various applications, user.name@oldcompany.com & user.name@comp.any (part of the companies new name is a valid TLD, in case that's relevant), the default username attribute in Okta is user.name@oldcompany.com and as such is the default across all our various applications.
Our Office 365 tenant has the following domains: @oldcompany.onmicrosoft.com (Default and fallback), @company.onmicrosoft.com, @oldcompany.com (Currently federated), @comp.any (Currently federated, and the current username for many existing users). Assigning the Office 365 app to existing users in this current configuration obviously results in error due to no matching user being found. I want to manage the current Office 365 user accounts, perform SSO, and manage/update their profile attributes using that default domain @oldcompany.com. It's my understanding that Okta could create new Office 365 users with this domain, but I don't want the users to lose any existing Office 365 data/their accounts. Is this possible? Note, we have AzureAD(EntraID) but there is no hybrid configuration or on-prem presence, if relevant.
Hello @MattD.37819 (Customer) Thank you for posting on our Community page!
If you have 2 domains within Office 365, assigning users to the application should not error out. You should be able to create separate users in both domains if needed. Or you can use one application for Provisioning and for the other domain you can setup an application just for the Federation/SSO.
For the Office application in Okta we also support 1 application that uses multiple domains for the federation, for this please see our doc below:
https://help.okta.com/en-us/content/topics/apps/office365/multiple-domains-support.htm
Thank you for reaching out to our Community and have a great day!
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