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
Please note that we have been made aware of an ongoing Nationwide incident within the UK Mimecast platform. This is causing delays in the sending and receiving of email for Mimecast customers. This does not affect internal messages.
The incident is currently being investigated by Mimecast support and we will provide an update by no later that 1pm GMT.
We are aware that some customers hosted on our UK grid may be experiencing intermittent delivery delays and messages may be held in the processing queue. We are currently investigating the issue and updates will be posted here as they become available.
Accesspoint
– Reports of circuit impact into the CityFibre TSC
– CityFibre TSC engaged CityFibre NOC for initial investigations
– CityFibre NOC confirmed an issue seen on active monitoring
– MI process engaged
– MI accepted
– Internal Bridge call scheduled
– NOC investigations ongoing with several examples of affected circuits provided from information gathering by TSC
At this juncture, it has been determined that several tunnels are currently flapping following initial investigations by CityFibre NOC.
15:30
We are aware of an issue with our upstream providers which they are currently investigating. Please stand by for further updates on this as we are made aware of them.
We are aware there is currently an issue with Duo texts not being sent. We are investigating this now.
This is currently causing inbound and outbound mail delivery issues, and access to the Mimecast personal portal is not currently functioning as expected.
We will post further updates as we receive them.