Mysterious Internal Server work?

[Aishagain]

OK maybe I am just thick  but what on Earth does this inscrutable entry mean on the Grid Status Page?

Scheduled Maintenance

Scheduled Maintenance for Internal Services Dec 16, 13:00-14:00 PST

We will be doing scheduled maintenance on a service which may affect agent or region presence. Please follow this blog for updates.
Posted on Dec 16, 10:41 PST

"Agent or Region  Prescence"??

[Solar Legion]

1 hour ago, Aishagain said:

OK maybe I am just thick  but what on Earth does this inscrutable entry mean on the Grid Status Page?

Scheduled Maintenance

Scheduled Maintenance for Internal Services Dec 16, 13:00-14:00 PST

We will be doing scheduled maintenance on a service which may affect agent or region presence. Please follow this blog for updates.
Posted on Dec 16, 10:41 PST

"Agent or Region  Prescence"??

For the former this includes Online/offline status (cannot remember what else) and for the latter ... Well suffice to say in the older days issues with region presence caused an odd state whereby you could get in but could not get out of a given region (the latter except by logging out and back in elsewhere). Such issues could also cause ghosting (avatar seemingly still on the region even though it was logged out or went elsewhere).