On Tuesday evening these servers will have operating system patches installed which require a restart. They will be restarted automatically at 7am Wednesday morning and should be back in service by 7:15am.
These servers will now be patched (and rebooted if necessary) on the morning following first Tuesday of each month, the same schedule as our Windows servers.
UPDATE
[2013-04-10 09:42:35 | Robert McNicholas]
The scheduled maintenance has been completed. The jabber server rebooted late (around 9am) and the service did not correctly autostart due to a firewall misconfiguration which has been fixed. Service resumed around 9:27am.
Resolved as of 2013-04-10 09:30:00