I've been trying for a while to come up with a set of tools to monitor the health of a mirror set and email a report nightly on the status of the mirror, or flag issues in real time. Making sure that all the databases are caught up, that all the mirror members are online.
Basically the title, I couldn't find anything concrete in the documentation regarding this. The documentation states 'The user-defined ^ZMIRROR routine allows you to implement your own custom, configuration-specific logic and mechanisms for specific mirroring events, such as a failover member becoming primary.' I didn't see any more details on what exactly those mirroring events are besides a failover member becoming primary, which I wasn't sure if that included a DR async becoming primary.