Question 1

What is the EOL Risk Score for Skype for Business Server Subscription Edition?

Accepted Answer

Skype for Business Server Subscription Edition has an EOL Risk Score™ of 30 out of 100, placing it in the Medium risk band. The score is calculated from four factors: EOL Recency (0/40), Attack Surface (10/30), CISA KEV Exposure (20/20), and Extended Support Availability (0/10).

Question 2

Is Skype for Business Server Subscription Edition still supported?

Accepted Answer

Skype for Business Server Subscription Edition is currently supported. End of life is scheduled for a future date. Plan your migration before that date to avoid security risk.

Question 3

When does Skype for Business Server Subscription Edition reach end of life?

Accepted Answer

The end of life date for Skype for Business Server Subscription Edition is not yet scheduled. Check the full Skype for Business Server version timeline at endoflife.ai/microsoft-skype-for-business-server.html for the latest information.

Question 4

What are the security risks of running Skype for Business Server Subscription Edition after end of life?

Accepted Answer

After end of life, Skype for Business Server Subscription Edition no longer receives security patches. Any newly discovered CVEs remain unpatched indefinitely. Organizations running EOL software also face compliance violations under SOC 2, PCI DSS, HIPAA, and ISO 27001, which require use of supported software versions.