Changing Office365 emails & UPNs due to school name change

[KSCSIT]

Hi all,

 

We need to change our staff/student UPNs & email addresses due to the name change of the school.

We've added an extra UPN to our AD & Azure AD Connect, which has happily sync'd through.

We've changed a few test users (& dogfooded it on ourselves!) which equally works well. But before we do this, have others done this & if so, are there any major things we need to watch out for?

 

We are aware it'll cause a bit of chaos with some things in sharepoint & how it appears on users desktops

 

https://learn.microsoft.com/en-us/sharepoint/upn-changes

 

and some of the changes can take 24 hours to fully sync through to Office 365 before completing - But we think we've got everything noted

 

Any advise from those that have done this would be welcomed

 

Thanks

[snagrat]

Shouldn’t take 24 hours really. If you run a sync it should take no longer than 15mins.

 

Have you considered aliases of the old email? These will need adding using the ProxyAddresses attribute

[KSCSIT]

It's not always instant - In our testing (& in the MS recommendations) it does say that it takes a while to ripple through the whole system - In our testing we found it didn't immediately update the "waffle" on 365 (The realm would say the old domain) so clicking the link would get confused. It also changes the onedrive URL.

 

Yeah we''re going to put the old email addresses down as an alias to avoid issues where services haven't changed.

[mavhc]

It's more like they're saying "Will take a max of 24 hours, don't complain until the account has been missing for 24 hours"

[free780]

It's more like they're saying "Will take a max of 24 hours, don't complain until the account has been missing for 24 hours"

 

MS state mailbox creation could take up to 24 hours.

 

People still fire emails to accounts just created like we are back in the on prem days.