Exchange Online. Hybrid and non hybrid.

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adam deltinger wrote:
Use the proxy addresses attribute!! You set all mail addresses here and the primary in capital SMTP:

For more info and powershell cmdlets Please see following link:
https://www.tachytelic.net/2018/08/office-365-how-to-change-primary-email-address/amp/

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thanks Adam.  I understand that i can use set-aduser, aduc, and ECP. However i wanted to know how to do it using powershell, set-remotemailbox absolutely did not work, it changed it on my local object but the newly added address did not sync at all. 

I just want to know how to do this with powershell. 

Thanks, 

Robert