This security update resolves vulnerabilities that exist when Skype for Business Server incorrectly handles OAuth token validation. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures CVE-2020-1025.
Note To apply this security update, you must have the release version of Skype for Business 2019 CU 2 installed on the computer.
How to get and install the update
To get this update, install the following updates:
Security update deployment information
For deployment information about this update, see security update deployment information: July 14, 2020.
How to get help and support for this security update
Protect yourself online: Windows Security support
Learn how we guard against cyber threats: Microsoft Security