Are there any Metrics available regarding Crossware Server Performance?
Since the launch of the Crossware Mail Signature Service, we have maintained an Uptime of 100% (last reviewed Q2 2019). Each region had an individual up time of 99.8%, but due to Azure regional redundancy the service was available 100% of the time.
Regarding the delay in email delivery. There is no significant delay introduced by the Crossware Mail Signature Service - over more than 100,000 emails the average delay was 4 seconds across the service.