Methodology
About
IT Deadline Radar tracks retirement and enforcement dates that change how an IT admin's tenant, certificates, or servers behave. It is a reading list, not a ranking of tools and not a status page for your tenant.
What gets a row
A row needs a public vendor document: a Microsoft Learn page, a vendor blog, a CA/Browser Forum Baseline Requirements file, or a Google help page. The 12 rows on the board were checked on 2026-10-15. Confidence is high when that page states the date in plain language. Confidence is medium when the page could not be re-fetched and the date comes from the indexed text, or when the vendor published a month instead of a day.
Message Center
Message Center posts are visible inside a tenant. This site does not invent an ID. The only IDs cited are MC1485116 and MC1447678, because those posts were read on the public archive at mc.merill.net. The card says so. Confirm them in your own Message Center before you treat the day as final.
When a date moves
If a later public document replaces a date, the card keeps both. The callout shows the previous date, the new date, and the document that changed it. Two dates that describe different milestones, such as Publisher's Microsoft 365 removal and the later end of perpetual support, are not labeled as a move.
What we leave out
No sponsor chooses a row, a date, or the sort order. There is no score and no "best tool" list. Reddit threads are not a source for a date. If a vendor page and a forum disagree, the vendor page wins, and the disagreement is written on the card when both were read.