So my company is rebranding from @companyA.com to @companyB.com, everyone is to be keeping the current @companyA.com address but is to have the primary SMTP be set to @companyB.com
My question is how do I add that email address to a bulk amount of users and set it as the default send as address but not the login? I am using exchange 365, I would imagine there is a powershell script for this but I am not sure where I would even start with it.
