Hi @e48q2 (e48q2)​,

Thank you for posting on the Okta community page!

The issue might be caused due to an Okta/Office misconfiguration when the switch was done, therefore I would recommend to review the setup between Okta and Office and make sure that everything was configured as per your organisation needs especially if provisioning was enabled:

• https://help.okta.com/en-us/Content/Topics/Apps/Office365/o365-main.htm

Additionally, I have managed to find the below documentation about Okta Office SMTP but this applies in case the users are not mastered by Active Directory:

• https://support.okta.com/help/s/article/How-to-populate-the-O365-email-alias-attribute-for-non-Active-Directory-users?language=en_US

I hope the above information is useful!

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