Mimecast Outage History
Mimecast degraded · 1 active incident View live status →Pingoru has recorded 35 incidents for Mimecast: 35 in the last 12 months and 13 in the last 90 days.
Show as a table
| Month | Incidents | Hours with an open incident |
|---|---|---|
| April 2026 | 1 | 0 of 720 (0%) |
| May 2026 | 5 | 50 of 744 (7%) |
| June 2026 | 8 | 29 of 720 (4%) |
| July 2026 | 8 | 149 of 744 (20%) |
| August 2026 | 3 | 9 of 744 (1%) |
| September 2026 | 5 | 73 of 720 (10%) |
| October 2026 | 5 | 70 of 590 (12%) |
Incidents, newest first
Minor June 6, 2026 Degraded performance on US grid 4h 40m United States Grid, Offshore Grid (Offshore Grid — End User Applications), Offshore Grid (Offshore Grid — Remediation)
Started Jun 06, 2026, 03:41 AM UTC· resolved Jun 06, 2026, 08:22 AM UTC
- investigating Jun 06, 2026, 03:41 AM UTC
We are aware that a small subset of customers hosted on our US grid may be experiencing a degraded service. We are currently investigating the issue and updates will be posted here as they become available.
- identified Jun 06, 2026, 05:04 AM UTC
We believe we have identified the issue affecting a small subset of US-hosted customers and are working to resolve it. We will provide further updates as they become available.
- monitoring Jun 06, 2026, 05:54 AM UTC
We have taken mitigation steps and continue to see improved services for previously impacted customers hosted on our US grid. We are continuing our resolution and further updates will be posted here.
Minor June 1, 2026 Degraded Service – Partner Portal Access 2h 57m Points of Contact, Points of Contact (Points of Contact — Mimecaster Support Center)
Started Jun 01, 2026, 09:32 PM UTC· resolved Jun 02, 2026, 12:29 AM UTC
- investigating Jun 01, 2026, 09:32 PM UTC
We are aware of a service disruption impacting access to the Partner Portal for some customers. Users may be unable to log in or may experience errors when attempting to access the portal. We are currently investigating the issue and will post further updates here as they become available.
Minor May 26, 2026 German (DE) Mail Processing Degraded 48m German Grid, Offshore Grid (Offshore Grid — Email Processing)
Started May 26, 2026, 01:37 PM UTC· resolved May 26, 2026, 02:26 PM UTC
- investigating May 26, 2026, 01:37 PM UTC
We are aware that some customers hosted on the German (DE) grid may be experiencing degraded service affecting email processing. We are currently investigating the issue, and updates will be posted here as they become available.
- monitoring May 26, 2026, 01:54 PM UTC
We have taken mitigation steps and believe impact to the service has been addressed. While recovery continues, some small mail flow delays may persist as the backlog clears. Our Engineering team is closely monitoring performance and investigating the cause of the high load. Further updates will be provided as needed.
Minor May 19, 2026 Degraded service for SAML authentication on US, USB and UK Grids 10h 21m United States Grid, United States B Grid, United Kingdom Grid, Offshore Grid (Offshore Grid — Authentication)
Started May 19, 2026, 04:38 PM UTC· resolved May 20, 2026, 03:00 AM UTC
- investigating May 19, 2026, 04:38 PM UTC
We are aware that some customers hosted on our US-B grid may be experiencing issues with SAML login attempts to the Administration Console and associated applications. Other authentication methods are functioning normally. We are currently investigating the issue and updates will be posted here as they become available.
- identified May 19, 2026, 04:58 PM UTC
We believe we have identified the issue affecting some customers hosted on our US-B grid who are experiencing failures with SAML login attempts to the Administration Console and associated applications. Our Engineering team is actively investigating the underlying cause and is currently testing a change to validate the suspected configuration issue. We will provide further updates as they become available.
- monitoring May 19, 2026, 05:23 PM UTC
We have taken mitigation steps and believe we have resolved the issue affecting SAML authentication for customers hosted on our US, USB and UK grids. Successful authentication attempts are now being reported, and we are no longer seeing related errors in our monitoring systems. Our Engineering team is closely monitoring the situation to ensure continued stability. Further updates will be posted here as they become available.
Minor May 19, 2026 TTP URL and Browser Isolation Errors on US and USB Grids 4h 28m United States Grid, United States B Grid, Offshore Grid (Offshore Grid — Threat Protection)
Started May 19, 2026, 01:59 PM UTC· resolved May 19, 2026, 06:27 PM UTC
- investigating May 19, 2026, 01:59 PM UTC
We are aware that some customers hosted on our US and USB grids may be experiencing issues accessing rewritten links, where URLs are being redirected through Browser Isolation and may result in an error. We are currently investigating this issue and will post updates here as they become available. All other Mimecast services are operating as normal.
- monitoring May 19, 2026, 03:05 PM UTC
We have taken mitigation steps and believe we have resolved the issue that caused certain TTP URL links to be incorrectly redirected through Browser Isolation for customers. This was caused by TTP URL links being incorrectly categorized as unknown, resulting in clean links being redirected through Browser Isolation and, in some cases, returning an error. We are now seeing a sustained reduction in Browser Isolation requests and believe service should be returning to normal. We will continue to monitor performance closely and provide further updates as they become availab
Minor May 13, 2026 Administration Console Loading Issues 1h 13m South African Grid, Offshore Grid (Offshore Grid — Administration Console)
Started May 13, 2026, 12:48 AM UTC· resolved May 13, 2026, 02:01 AM UTC
- investigating May 13, 2026, 12:48 AM UTC
We are aware that some customers hosted on our ZA grid may be experiencing intermittent issues accessing the Mimecast Administration Console. Our engineering team is actively investigating the issue and we will provide further updates as they become available.
Minor May 9, 2026 DE Grid - Degraded service impacting Cybergraph and other services 1d 11h German Grid, Offshore Grid (Offshore Grid — Email Processing)
Started May 09, 2026, 08:45 AM UTC· resolved May 10, 2026, 08:00 PM UTC
- investigating May 09, 2026, 08:45 AM UTC
We are aware that some customers hosted on our German (DE) grid may be experiencing degraded service affecting Cybergraph and other services. We are currently investigating the issue, and updates will be posted here as they become available.
- identified May 09, 2026, 09:40 AM UTC
We have identified the issue affecting Cybergraph and other services in the German (DE) grid and are working to resolve it. We will provide further updates as they become available.
- monitoring May 09, 2026, 10:34 AM UTC
We have taken mitigation steps and believe the service degradation issue affecting Cybergraph and other services in the German (DE) grid has been resolved. We are closely monitoring performance and will provide further updates as they become available.
- monitoring May 09, 2026, 07:31 PM UTC
We have taken mitigation steps and believe the service degradation issue affecting Cybergraph and other services in the German (DE) grid has been resolved. We are closely monitoring performance and will provide further updates as they become available.
Minor April 19, 2026 Partial Outage detected on status page – Overall
Started Apr 19, 2026, 09:02 PM UTC· resolved Apr 19, 2026, 09:02 PM UTC
No vendor updates were posted for this incident.