Y2K22 bug: Microsoft rings in the new year by breaking Exchange servers all around the world

For many, the New Year was a time to spend with family and friends and a time to form loose and hopeful pacts in the form of New Year’s resolutions. For sysadmins responsible for Exchange servers, it’s been a much different story as Microsoft Exchange servers have not been able to properly process the new date, and therefore, can’t process mail.

The first social report for this rolled in at 1am EST from Reddit user /u/FST-LANE who suggested that Microsoft released a bad update, aptly named “220101001”. This was presumably a scheduled patch to allow for processing the new date, but it didn’t go as planned. “ I see a bunch of errors from FIPFS service which say: Cannot convert “220101001” to long,” wrote /u/FST-LANE.

This aligns with reports from Marius Sandbu, manager for the Norwegian firm Sopra Steria, who released a detailed synopsis of the cause. He reports Microsoft Exchange servers have stopped processing mail all together because it isn’t prepared to handle today’s date. He states, “The reason for this is because Microsoft is using a signed int32 for the date and with the new value of is over the max value of the “long” int being 2.147.483.647.”

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