In our AD our emails don't match our UPN, so when we sync with Azure AD using UPN any accounts that have been pre-created don't match. We get two accounts for the od user.
lets assume upn is
email@example.com email is
If we plan to DELETE the miss matched accounts and just leave the UPNs will this create a problem for tools such as Skype for business (other than having to login with the UPN and it being a different USER)? Will external users be able to find our Skype users if they search by email?
I understand that deleting the duplicated accounts may also create problems for things like favourites in the
Skype for business client.
We are not using exchange online (yet)
Or, if we CHANGE the UPNs to match the email, will this change just flow through to AzureAD? eg if we change UPN from
firstname.lastname@example.org will the user be able to start using
email@example.com or will it get in a muddle.
I understand that any internal apps that use UPN may need to be looked at.
Or, should we just sync using the email address as the unique key and just leave the UPN as is. I guess we will need to turn off syncing and re-install the tools.