bleepingcomputer[.]com/news/microsoft/microsoft-exchange-year-2022-bug-in-fip-fs-breaks-email-delivery/
neowin[.]net/news/y2k22-bug-microsoft-rings-in-the-new-year-by-breaking-exchange-servers-all-around-the-world/
"Microsoft Exchange Server is Microsoft's email, calendaring, contact, scheduling and collaboration platform. It is deployed on the Windows Server operating system (OS) for business use."techtarget[.]com/searchwindowsserver/definition/Microsoft-Exchange-Server
Unfortunately Exchange Server cannot handle today's date, 1/1/2022, and so will not process emails. The workaround SysAdmins are using is to turn off malware scanning, so your inbox is likely to hold more malicious email than normal.
