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Microsoft Teams Desktop Client Faces Launch Failures After Update Triggers Caching Regression

ID: 7124e3ee-9d76-539b-a251-003e01a946f9

STIX ID: report--7124e3ee-9d76-539b-a251-003e01a946f9

Feed Name: cybersecurityNews.com

Date Published: 2026-04-20

Date Updated: 2026-05-05

Author: Guru Baran

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Microsoft reported an outage (incident TM1283300) impacting a subset of Teams desktop clients due to a recent update that corrupted the build-caching system; engineers reverted the update and advise affected users to fully quit and relaunch the desktop app to receive the fix, while web and mobile Teams remain unaffected.

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