Share logrotate configuration with all domains?
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.