Claude Down: Login Failures Hit Claude.ai as Microsoft Outage Lingers
Claude users could not log in on Friday, Nov. 13, after Anthropic’s chatbot suffered a major outage that the company confirmed on its status page, according to Men’s Journal. Anthropic said it was investigating login issues affecting Claude.ai and Claude Code, and it has not said what caused them.
The trouble arrived while Microsoft was still working to bring back Outlook and Teams after a separate global outage that started Thursday. That Microsoft incident had already broken some of Claude’s links to Outlook email and calendars.
Which Claude services went down
Anthropic’s status page listed a major outage for Claude.ai and partial outages for Claude Code and the developer console, the console developers use to manage access to Anthropic’s models. Men’s Journal reported that Anthropic deployed a fix and began monitoring recovery at 6:05 a.m. ET.
After the fix, Claude Code and the developer console returned to normal, according to the report. Claude.ai was a different story. As of 9:25 a.m. ET, the status page still showed a major outage for the main chat site. The report also noted that Downdetector, which collects user complaints, showed a Claude outage within the last 24 hours.
Anthropic has not disclosed the cause of the login failures. If Claude still will not load, our guide to telling an outage apart from a usage limit or capacity error covers the basic checks, starting with the status page.
How Microsoft’s outage reached Claude
The two problems happened at about the same time, but Anthropic has not linked the login failures to Microsoft. A separate set of issues does trace back to Microsoft, though. Claude’s Microsoft 365 connector, which lets the chatbot read a user’s Outlook email, calendar and files, has had trouble reaching that data since Thursday afternoon. Anthropic said a Microsoft 365 service incident caused it and that the same incident affected Claude for Outlook. We covered the start of those Claude connector errors on Nov. 12.
OpenAI reported something similar on Thursday, saying its Microsoft connectors for ChatGPT were not working as expected, Men’s Journal reported.
What this means for Outlook and Teams users
Microsoft’s outage started Thursday, when users in the Americas reported trouble getting into Exchange Online mailboxes, the email service behind business Outlook accounts. Teams and other Microsoft services were disrupted too.
On Friday morning, Microsoft said its attempted fix was not working as intended, according to the Associated Press. The company also said it had found no evidence of a cyberattack.
Government offices in Singapore, the Philippines and Japan reported disruptions. India’s IndiGo airline and parts of the UK’s National Health Service were also affected. Men’s Journal cited Downdetector as logging more than 130,000 reports of Outlook problems at Thursday’s peak.
Microsoft has not given a timeline for restoring all affected services. The Claude connector problems stem from that Microsoft incident, so they are separate from the Claude.ai login fix.
Source: YAHOO!