The Exchange service will be restarted at 12:45. All users will need to log in again to Outlook. This is being done at short notice to correct the continuing problem where Outlook asks repeatedly for users to log in.
UPDATE. There have been no outages since these incidents.
The incoming mail gateway for columbia.edu is a pool of 9 servers behind a load balancer. Since Monday 3 hosts in the pool have had outages.
Remote systems that happened to reach a host when it was not able to accept mail were given a Temporary Fail response, which tells the remote system to try again. The result of this would be a delay in delivery, until the remote system re-tried successfully.
Some campus hosts including multifunction devices use the same pool of hosts under the name mx.columbia.edu. Some devices showed the error "451 Please try again later" (this is the Temporary Fail response) while other devices just re-tried automatically.
All of the hosts are up and running properly at this time. The cause of the errors is being investigated.
UPDATE - This work was completed successfully by 7:15AM.
On 6/25/14 between 5am and 8am CUIT will be performing necessary network maintenance which will affect multiple buildings. During portions of this service window, all network services will be unavailable (this includes wired, wireless, and netphones) in the following buildings:
401 W 118
423 W 120
501 W 121
519 W 121
527 W 121
500 W 122
502 W 122
506 W 122
520 W 122
524 W 122
526 W 122
530 W 122
540 W 122
The following buildings will lose redundancy during the outage but all network services should remain available:
401 W 118
82 Morningside Dr.
90 Morningside Dr.
The goal of this maintenance is to replace and upgrade legacy network equipment in order to maintain quality, state of the art network services.
For questions about this event, please contact the CUIT Helpdesk at firstname.lastname@example.org, or call 212-854-1919.