I have a client that still has on-premise Exchange 2010 servers and wants to finally get rid of them as all of their infrastructure is being moved to Azure. They do not want to migrate those legacy servers to Azure, so what is the best course for finally getting rid of them. I understand that this may not be fully "supported" from Microsoft, but I don't care. I am interested in what will work.
1) Copy out all email addresses to a file
2) Remove the Hybrid configuration (Note: they put in place a Hybrid config, but never used it. Migration was done using BitTitan. Exchange Hybrid feature was never selected in Azure AD Connect)
3) Delete Exchange databases in ADSIEdit manually. Mailboxes still exist.
4) Remove the DAG and get rid of the cluster
5) attempt uninstall of Exchange servers one-by-one
Will this work? By uninstalling, does it remove any email attributes from AD that we need to be aware of? Stop AD Connect during this?
Thanks,