Office 365 Advisory Duplicate Messages and Incorrect Delivery to Junk or Quarantine
Check Junk and Quarantine for Important Messages
Many Office 365 customers have reported their staff receiving duplicate e-mail messages or missing messages that were incorrectly delivered to junk or quarantine. Not all Office 365 tenants are experiencing these issues but they do seem to be widespread. Admins can check Service Health in the Office 365 Admin portal. Microsoft reports a fix is currently being deployed for duplicates and inappropriate junk delivery.
EX149947 – Duplicate mail send issue
Users may notice duplicate emails from Microsoft 365 users or devices that utilize SMTP client submission.
Title: Duplicate mail send issue User Impact: Users may notice duplicate emails from Microsoft 365 users or devices that utilize SMTP client submission. More info: As a workaround, we recommend users and admins leverage Option 2 or Option 3 within the KB article if they’re seeing duplicate copies: https://support.office.com/en-us/article/How-to-set-up-a-multifunction-device-or-application-to-send-email-using-Office-365-69f58e99-c550-4274-ad18-c805d654b4c4. Current status: The build that contains the fix for the issue is currently being deployed and has saturated approximately 17 percent of the affected environment. We expect that this deployment may not complete until the middle of next week. Scope of impact: Your organization is affected by this issue. Impact is specific to any emails sent using SMTP client submission. Start time: Monday, September 17, 2018, at 9:00 PM UTC Estimated time to resolve: Based on current deployment progress, we expect this problem to be resolved by the middle of next week. Preliminary root cause: A recently deployed code change is causing duplicate copies of emails to be sent using SMTP client submission. Next update by: Friday, October 19, 2018, at 8:00 PM UTC
2018-10-18 08:00 (UTC)
2018-10-03 02:16 (UTC)
EX151576 – Mail items incorrectly delivered to Quarantine or Junk folder
Admins may notice mail items being incorrectly delivered to the Quarantine or Junk folder.
Title: Mail items incorrectly delivered to Quarantine or Junk folder User Impact: Admins may notice mail items being incorrectly delivered to the Quarantine or Junk folder. Current status: We completed whitelisting the affected URLs and confirmed that this will prevent additional impact as of at 5:45 AM UTC on Thursday, October 18, 2018. We’re investigating possible recovery methods for emails that were affected by this issue. Scope of impact: Impact is specific to a limited subset of mails being sent through the affected infrastructure. Start time: Wednesday, October 17, 2018, at 10:41 PM UTC Preliminary root cause: A list of URLs have been incorrectly blacklisted within the EOP service, which is causing mail to be delivered to the Quarantine or Junk folders. Next update by: Thursday, October 18, 2018, at 6:00 PM UTC
2018-10-18 06:01 (UTC)
2018-10-17 22:41 (UTC)
Microsoft has a 99.99% uptime (or approximately 45 minutes of downtime per month) Service Level Agreement with all cloud customers and is historically reliable as shown at the Office 365 Operations Trust Center.
Matrixforce is a direct Cloud Solution Provider with Microsoft and will publish any necessary customer action upon official notification from Microsoft.