Incident Resolved

Microsoft have mitigated the issue by diverting Mail flow around the affected infrastructure. 
 
Email services should now be returning to normal, however due to the backlog of emails, it may take some time for emails to send through as per usual. 
It would also be advisable to resend emails that you have received bouncebacks on to ensure they reach their intended recipients. 
 
Kind Regards
Accesspoint Support Team

Status Update

Quick update from Microsoft
 
Current status: We’ve disabled an interceptor rule that we believe was causing impact to the mail flow. We’re monitoring the service to ensure the mail flow is restored.

Status Update

Please see the below from Microsoft: 
 
Current status: We’ve identified that a change to the free/busy infrastructure resulted in impact to the Exchange online mail flow infrastructure. We’re identifying a plan to mitigate impact and restore mail flow.
 
Next update is expected by 11:00 AM

Incident Started

Some users may be unable to send Exchange Online email messages

We have been made aware of certain users may be unable to send Exchange Online email messages. Affected users may receive the following error “503 5.5.1 bad sequence of commands”

The issue is currently with Microsoft who are reviewing service monitoring telemetry to isolate the root cause and develop a remediation plan.

We expect an update on the matter from Microsoft at 10:30 AM

Incident Resolved

Please be aware that the remediation work has now concluded and  services have now been fully restored. All client platforms are once again fully operational. We will continue to monitor the platform following this. 

Status Update

Please be advised, remedial work is continuing to progress on the replacement hardware by Accesspoint engineers. 

Status Update

Engineers have replaced hardware at the datacentre and remedial work is now underway to configure the new hardware. 

Status Update

The issues at the data centre are still ongoing. The cause has now been identified and engineers are in attendance at the data centre with replacement equipment. The remedial work is expected to take a few hours to complete.
 
We will provide further updates on the progress as they become available. 

Status Update

The issues at the data centre are still ongoing and investigation into the root cause is continuing. The issue has been isolated to a subset of servers and we will provide further updates as they become available. 

Incident Resolved

Please be aware that Mimecast have now resolved the issue with UK email service and mail flow has now returned to normal.