Microsoft has released new cumulative updates for Exchange Server 2016, Exchange Server 2013, and Exchange Server 2010 SP3 in June 2018.
I strongly recommend you keep an archive copy of every Exchange Server installer, service pack, update rollup, and cumulative update in case of a support or recovery scenario that requires it.
How to use Exchange Online mail flow rules to improve the effectiveness of your EOP spam filtering and protect Office 365 users from phishing attacks.
How to use Azure Active Directory conditional access policies to block legacy applications such as POP, IMAP, and basic authentication from connecting to Office 365.
Microsoft has announced the start of the migration of customers from the Office 365 admin center to the new Microsoft 365 admin center.
Take a look at Azure ATP (Advanced Threat Protection), the cloud-based security service by Microsoft that provides monitoring and alerting for suspicious activity in your on-premises Active Directory environment.
Windows Defender ATP now integrates with Microsoft Intune, allowing ATP device threat levels to be taken into consideration for Intune device compliance policies.