I have an issue with AD sync to my Office 365 tenant.
I have two domains in Office 365 and a single on-prem AD forest. When syncing using AD Connect some of my user accounts receive the incorrect domain name as part of their username. When I try to fix on Office 365, I am prompted that this can only be fixed using the on-prem AD. (Even though the username has the correct domain suffix in AD)
Any ideas as to how can I manually adjust the suffix ?