Typically, these patches include a tfs2015.4.xpatch.exe . Run this on your Application Tier.
Before you unzip TFS-Update_4a-pc.zip and run the installer, ensure you have completed these steps: TFS-Update_4a-pc.zip
Check the official Microsoft DevOps Blog for the latest patch notes and security advisories. Team Foundation Server 2015 Update 4 Release Notes Typically, these patches include a tfs2015
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