Non-recurring meetings will expire in 2 weeks, if someone will opens it on 15th days after meeting end date the URL will not work with error as below. I think 14 days is hardcoded, I’m not sure we can change it – refer to http://www.justin-morris.net/lync-conference-expiration-and-deactivation-explained/
To avoid the issue, create a recurring meeting, they will expire after farthest occurrence in the future.
About timestamp – note it is hardcoded to UTC time zone.
Machine:xxJoin attempted at(UTC):05/05/2017 07:52:54CorrelationId:94320997User Agent:Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.96 Safari/537.36Accept Header:text/htmlapplication/xhtml+xmlapplication/xml;q=0.9image/webp*/*;q=0.8Incoming URL:https://yyyTelemetryId:ffcc417b-9794-4445-8110-a530a3016ebdError:Invalid Conference organizer or Conference ID