Cross-site scripting (XSS) vulnerability in Outlook Web Access (OWA) in Microsoft Exchange Server 2016 allows remote attackers to inject arbitrary web script or HTML via a crafted URL, aka "Exchange Spoofing Vulnerability," a different vulnerability than CVE-2016-0031.
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-010