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Researched articles and explainers on social media platforms, data, privacy and online communities.

Bar chart comparing how long 12 organisations keep Microsoft Teams chats, from 7 days at Washington State's Department of Ecology to 400 days at Purdue University, with five organisations at 30 days.

How long does Microsoft Teams keep your chats? It depends on who set the timer

Teams has no built-in expiry. Organisations choose one, and the published policies we checked range from seven days to 400. Here is what they chose, what "deleted" really means, and what you can still do about it.

November 4, 2026

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