New Blog Post | Protecting on-premises Exchange Servers against recent attacks

Protecting on-premises Exchange Servers against recent attacks - Microsoft Security

For the past few weeks, Microsoft and others in the security industry have seen an increase in attacks against on-premises Exchange servers. The target of these attacks is a type of email server most often used by small and medium-sized businesses, although larger organizations with on-premises Exchange servers have also been affected. Exchange Online is not vulnerable to these attacks.