I have been asked to standardise email addresses across my organisation of approx. 10000 mailboxes. Currently, there is a mismatch of email addresses as over time, when creating accounts nothing was followed to standardise.
I would like to know the easiest way to convert all accounts to firstname.lastname@example.org. I would also like to be able to specify what happens if there are two users with the same name.
Are there any scripts I should be running to verify health of addresses before hand? Is there anything to look out for gathered from your experience?