Exchange Online mailboxes sync delay [office365]

Event timeline

How this incident unfolded, from the official status page.

1. Identified

   almost 2 years ago

   Front

   Our partner Microsoft is experiencing a service degradation affecting Exchange Online mailboxes. You can follow Microsoft Issue ID MO941162 for more details. This may cause outbound/inbound delays for customers using Office 365, as Front cannot connect to Microsoft servers.

2. Identified

   almost 2 years ago

   Front

   Microsoft is still investigating the issue; here is their latest update. > We’re continuing to investigate recent changes, service telemetry and the failure paths to determine the root cause of impact. Source: https://portal.office.com/Adminportal/Home#/servicehealth/:/alerts/MO941162 (You need to be an O365 admin to be able to access it)

3. Identified

   almost 2 years ago

   Front

   Microsoft is deploying a fix > At 15:27 CET > We’re monitoring the progress of the fix, which has been deployed to approximately 60% of the affected environments. We’re continuing our manual restarts on the remaining impacted machines. We are closely monitoring our systems for signs of recovery; however, we have not observed any significant progress at this time.

4. Monitoring

   almost 2 years ago

   Front

   Microsoft deployed a fix. Our systems are recovering. Latest update from Microsoft: > At 20:52 CET > We're continuing to redirect traffic and apply targeted remediation to impacted servers. > We've observed initially positive results in some areas, and we're monitoring service health closely as our mitigation workstreams continue in parallel.

5. Monitoring

   almost 2 years ago

   Front

   Our systems have fully recovered. We are now retrying failed tasks.

6. Resolved

   almost 2 years ago

   Front

   This incident has been resolved.