We have an Azure AD subscription and when I go and look at custom domain names, I see ourcompany/email(example is contoso.com) which is verified and set as primary. I also see contoso.onmicrosoft.com with status of available. The only issue is when I upload a user through Azure Sync, they come in as default of jdoe@contoso.onmicrosoft.com and I always go into Office365 admin and click manage username to select the contoso.com domain(instead of contoso.onmicrosoft.com). The only reason I care is because we want users to be able to use seamless logins for Office365 and I had a report of an issue(once, but just setting this up) where a user could not go in until I changed their username to jdoe@contoso.com, etc. I am not seeing a way to change the defauly username to be contoso.com even though it is set as primary. Does anyone have any ideas or feedback on this?
Thanks,
Dave