Microsoft is investigating an ongoing incident that prevents users from opening files in Teams and Office for the web, including Excel. Initial analysis indicates a potential cross-service issue and the outage has been tagged as a critical incident.

Users may be unable to open files in Office for the web, with impacted Office Apps including but not limited to Excel.
In a subsequent update, the company revealed that initial analysis indicates a potential cross-service issue impacting Office for the web experiences.
Admins should track MO1329446 in the Microsoft 365 admin center for telemetry updates on the cross-service disruption.
Tap a lens to see what this story means for you.
Reader-supported · Daily Brief
Daily brief at 7 AM ET. Top tech stories, every morning. Sourced and fact-checked.
Reader-supported
The Circuitry is a passion project I've always wanted to build, and I love the work behind it.
Running it costs real money. APIs, hosting, time. To keep improving the site and growing this into something useful for everyone, those costs have to be covered.
Any contribution is appreciated. If not, no pressure. Thanks for reading.
CISA warned that hackers are actively exploiting a recently patched high-severity flaw in SolarWinds Serv-U software to crash servers and added it to its Known Exploited Vulnerabilities Catalog. The agency ordered federal agencies to patch by June 19 and urged all organizations to mitigate the ongoing attacks immediately.
S&P Dow Jones Indices refused to waive seasoning, profitability, or public float rules for SpaceX's IPO, blocking accelerated S&P 500 entry that could have unlocked billions in passive funds. The same barriers now apply to expected IPOs from OpenAI and Anthropic, limiting exposure of retirement assets to unprofitable AI bets.
New York lawmakers approved a one-year moratorium on new large data centers, the first such statewide measure if signed by Governor Hochul. The pause aims to study environmental and energy impacts amid growing AI-driven demand.