I am setting up for a Pilot of O365 and Link using PingIdentity. I have been instructed to setup a second UPN on my Local AD prior to activating DirSync. This will allow my local users to go to the O365 portal and logon using their portal crendentials (onmicrosoft.com or other domain creds on the Azure Site). Is it possible to reverse this scenario and add our Local UPN suffix as a second UPN Suffix in our Azure AD so that users can logon to O365 using their Local UPN that they have used for ever?
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