The fact that Vice President Mike Pence used his private email account for state business, including sensitive local and global security issues and that they were hacked, is a scandal. This is an example of hypocrisy, given that the VP routinely criticized Hillary Clinton for using her private email while serving as Secrtary of State, writes Tony Cook in the IndyStar. Aside from the cybersecurity aspect, using a private email means less government transparency, as private emails do not show up on state servers and therefore can't be searched in public record requests.
The fact that Vice President Mike Pence used his personal email account for state business should not be considered the same scandal as Hillary Clinton's email controversy during the election. The biggest difference is that Pence didn't have as high of security clearance as Clinton did, so his emails were less sensitive. Plus, he had been using his personal email account since the 1990s and did not set up a special private service like Clinton did, reports Mathhew Nussbaum in Politico, citing the Pence campaign. Plus, his use of personal email was routine in the governor's office.