Advisory information Title: Some users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web ID: EX294033 Status Service Restored Details Title: Some users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web User Impact: Users may have been unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web. More info: The affected features included: FindTime Board Calendar Signatures Final status: Our fix has completed deployment and we've confirmed via telemetry that impact is resolved. Scope of impact: This issue affected a very limited number of users who were served through the affected infrastructure. Start time: Monday, October 25, 2021, at 3:53 AM UTC End time: Thursday, October 28, 2021, at 12:02 AM UTC Root cause: A recent update which, while intending to improve the Outlook on the web infrastructure, inadvertently introduced a code regression that resulted in impact. Next steps: - We're reviewing our service update procedures to identify opportunities to improve impact detection during testing and better prevent similar future impact. This is the final update for the event.
Thank you, The Microsoft team
Posted Oct 28, 2021 - 07:33 CDT
Investigating
Exchange Online service alert
Advisory information Title: Some users are intermittently unable to access their mailboxes through multiple connection methods ID: EX294404
Status Service Degradation
Details Title: Some users are intermittently unable to access their mailboxes through multiple connection methods
User Impact: Users may intermittently be unable to connect to the Exchange Online service through IMAP, SMTP, and POP3.
More info: Users of the legacy Transport Layer Security (TLS) version 1.0 are experiencing intermittent failures when attempting to connect to Exchange Online from IMAP, SMTP, and POP3.
Current status: After our CAFE infrastructure investigation, we've identified a subsection of CAFE service infrastructure that has a TLS configuration issue and is intermittently preventing users of TLS 1.0 from connecting to the Exchange Online service through IMAP, SMTP, and POP3 connection methods. We've developed and are deploying a fix that will correct the TLS configuration and expected to remediate impact.
Scope of impact: A small subset of users of TLS 1.0 are intermittently unable to connect to Exchange Online from IMAP, SMTP, and POP3.
Root cause: A CAFÉ TLS configuration issue is preventing some users from connecting to the Exchange Online service through IMAP, SMTP, POP3. Next update by: Wednesday, October 27, 2021, at 11:00 PM UTC