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Change stream · Microsoft Defender for Office 365 what's new

Block communication from sender email address and domains in Teams

1 Jan 2026 · Defender

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Monitored guidance in the same product area; this does not establish that the article cites each page.

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 26 Oct 09:15 UTC · 272 of 272 readable · 270 fully read · documentation 469/469 current

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