When this is set to No, Virtualmin will create a separate block in the `logrotate` configuration file for each virtual server. This allows each to have different settings, but will cause the web server to be restarted after the rotation of each domains' logs - possibly interrupting service.

Selecting Yes will cause all new domains to share a single configuration block, which means the web server only has to be restarted once. However, it is not possible to have different rotation settings for each domain.