Change UPN on Office365 manually using Powershell
In some circumstances the UPN changes on on-premise do not get updated to Azure/Office365. If you are syncing from your on-premise AD then updating the UPN in Azure using powershell is going to get overwritten the next time that your sync process runs but in a situation where its changed to correct value then it will just be replaced by same value. This manual process can be used for speeding up the change or making the change if sync is unsuccessful.
If I have understood the question correctly then by updating the UPN … Read the rest