# Outlook 365 Login Issues

- Provider: [Calendly](https://down.guide/calendly)
- Level: confirmed
- Impact: Major outage
- lasted 0m
- started 2026-04-15 15:21 UTC
- id: DWN-97a9f60cbf
- Official page: https://calendlystatus.com/incidents/01KP8VQPPE3JY3TPERE8BTKPHJ

## Updates from Calendly
### 2019-01-29 21:38 UTC: identified
We have identified an issue with logins affecting customers using Microsoft's Azure Active Directory service. This can affect users that have signed up for Calendly using the Outlook 365 service and prevent them from logging into the application. Our team has identified a fix and is working on resolving the issue.

### 2019-01-29 21:47 UTC: identified
The issue appears to only affect a small subset of users and is intermittent in nature. If you experience problems logging in, please refresh and try again.

### 2019-01-29 21:57 UTC: identified
The root cause of this issue appears to be an outage in Microsoft's Azure cloud services. We will provide updates as we receive them.

### 2019-01-29 22:23 UTC: monitoring
Microsoft engineering teams have identified a DNS issue and have failed over to an alternative DNS provider. The login issues with the Calendly platform appear to be fixed. We are monitoring closely and will provide any further updates as necessary.

### 2019-01-29 23:06 UTC: resolved
DNS issues affecting logins using the Outlook 365 service appear to have been resolved. If you experience any further issues, please reach out to support@calendly.com

---
down.guide reads providers' official status pages every minute and adds its own evidence, always labeled. Free, no account. Agents: MCP at https://down.guide/mcp, REST at https://down.guide/api/v1, feeds at https://down.guide/feed. Built by Sazabi (https://sazabi.com/?utm_source=down-guide&utm_medium=markdown).