Sentinel Cloud
Affected: Sentinel Cloud
Timeline · 2 updates
- investigating Jan 24, 2026, 08:16 AM UTC
We are currently investigating this issue.
- resolved Jan 24, 2026, 09:24 AM UTC
This incident has been resolved.
Sentinel Outage History
Sentinel is up right nowSentinel had 23 outages in the last 2 years totaling 420h 15m of downtime — averaging 0.9 incidents per month.
There were 23 Sentinel outages since July 19, 2024 totaling 420h 15m of downtime. Each is summarised below — incident details, duration, and resolution information.
Powercut
Timeline · 2 updates
- identified Jan 22, 2026, 03:10 PM UTC
A fault has been identified with electrical works that have taken Salisbury road that has caused a power cut at our office. This has reduced the service we can provide. We apologies for any delays that occur because of this. We are still operational but with reduced service.
- resolved Jan 22, 2026, 03:44 PM UTC
Power has been restored to our office. Operation will resume as normal.
Primary Data Centre Power supply Outage
Affected: Telephone SystemE-mailUniFi Cloud ControllerSentinel CloudSentinel VoiceVigor ACS 3Automate RMM MonitoringUISP Management System
Timeline · 2 updates
- identified Jan 22, 2026, 03:07 PM UTC
The issue has been identified and a fix is being implemented.
- resolved Jan 22, 2026, 03:45 PM UTC
Power has been restored.
Outage- Go Cardless
Affected: Direct Debit Payments
Timeline · 3 updates
- investigating Jan 22, 2026, 09:26 AM UTC
We are currently investigating this issue.
- investigating Jan 22, 2026, 09:27 AM UTC
We are continuing to investigate this issue.
- resolved Jan 22, 2026, 09:27 AM UTC
This incident has been resolved.
Sentinel Cloud- Hosted Services
Affected: Sentinel Cloud
Timeline · 5 updates
- investigating Jan 19, 2026, 07:16 AM UTC
We are currently investigating this issue.
- investigating Jan 19, 2026, 07:16 AM UTC
We are continuing to investigate this issue.
- monitoring Jan 19, 2026, 08:08 AM UTC
A fix has been implemented and we are monitoring the results.
- monitoring Jan 19, 2026, 08:08 AM UTC
We are continuing to monitor for any further issues.
- resolved Jan 19, 2026, 09:45 AM UTC
This incident has been resolved.
Post-dial delay and audio issues on softphones and handsets
Affected: Telephone System
Timeline · 5 updates
CallSwitch degraded performance on inbound and outbound calling
Affected: Telephone System
Timeline · 5 updates
- investigating Jan 13, 2026, 12:53 PM UTC
An issue has been identified with degraded performance on the Callswitch dashboard and issues with inbound and outbound calls. This is being investigated currently.
- identified Jan 13, 2026, 01:00 PM UTC
Call traffic has been rerouted and are monitoring the results of this.
- monitoring Jan 13, 2026, 01:02 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jan 13, 2026, 04:06 PM UTC
Incident has been confirmed resolved.
- postmortem Jan 22, 2026, 10:33 AM UTC
**Incident Analysis** Following our initial report regarding the incident on January 12, 2026, our Engineering team implemented several emergency infrastructure upgrades. These improvements successfully mitigated the original risk and provided the enhanced visibility required to monitor this segment of our network more closely. On the afternoon of January 14, 2026, the same Memory Cache Layer within a single zone experienced a secondary disruption. This resulted in a 40-minute service outage affecting handsets, mobile applications, and in-call media, for accounts in that zone. Thanks to the telemetry tools installed earlier this week, our team was able to rapidly isolate a specific software bug within this layer. This bug was triggered by recent increases in network traffic. We have since successfully replicated, retested, and deployed a permanent fix across all zones. We will continue to monitor the network closely to ensure continued stabilit
VoiP service load issue
Affected: Telephone System
Timeline · 5 updates
- investigating Jan 12, 2026, 11:44 AM UTC
We are currently investigating an issue of reported issues with the Callswitch dashboard and inbound & outbound calls not functioning.
- monitoring Jan 12, 2026, 11:52 AM UTC
A fix has been implemented and we are beginning to see traffic return to normal and services resuming across the board. We will update again within 15 minutes.
- monitoring Jan 12, 2026, 11:52 AM UTC
We are continuing to monitor for any further issues.
- monitoring Jan 12, 2026, 12:10 PM UTC
There is still some reported intermitance with the dashboard and some reports of calls not working but services are restoring, we are continuing to monitor the issue.
- resolved Jan 13, 2026, 09:18 AM UTC
This issue is now resolved and all services are now operational. Do let us know if there are any further VoiP issues.
Server connection 60 minute error message
Affected: Sentinel Cloud
Timeline · 3 updates
- investigating Dec 17, 2025, 09:59 AM UTC
We are currently having licensing communication issues with the Windows servers that is either presenting a warning message that the user will be disconnected after 60 minutes. Some users will not be able to sign in at all. We are investigating the licensing services. Users having the 60 minute disconnect warning should be able to sign in after being disconnecting.
- monitoring Dec 17, 2025, 02:16 PM UTC
We have identified the a fault which we ran a repair. We have not been able to replicate the error and are now monitoring the issue to be sure licensing is working correctly across all servers.
- resolved Dec 17, 2025, 03:37 PM UTC
This issue has been confirmed resolved. If there are any further service issues please get in contact with our support.
Viop Issue
Affected: Telephone System
Timeline · 5 updates
- investigating Nov 17, 2025, 10:42 AM UTC
We are aware of an issue with the VoIP and are not hearing inbound/outbound calling. We are in contact with the 3rd party to resolve this promptly.
- identified Nov 17, 2025, 10:59 AM UTC
Our supplier has identified the issue and is looking to implement the fix. We will continue to monitor and update through tickets raised through support.
- identified Nov 17, 2025, 11:16 AM UTC
Some customers may experience delays on calls while we clear a backlog of SIP messages.
- monitoring Nov 17, 2025, 11:39 AM UTC
Some services have been restored and are slowly returning to normal service. We are continuing the status of the phones.
- resolved Nov 17, 2025, 01:43 PM UTC
The issue has been resolved, and service is back to normal.
VoiP service issue
Affected: Telephone System
Timeline · 8 updates
- investigating Oct 21, 2025, 10:36 AM UTC
We are currently investigating an issue with VoiP services experiencing degraded performance that is effecting external and internal calling.
- investigating Oct 21, 2025, 11:04 AM UTC
This issue has been reported to also affect softphone applications. The issue is still ongoing investigation.
- identified Oct 21, 2025, 11:40 AM UTC
A fault has been identified which is currently being repaired. Services are slowly restoring and service should now be restoring itself.
- identified Oct 21, 2025, 12:20 PM UTC
The ongoing fault is still causing disruption across dashboards, apps, handsets and calls. Efforts to resolve the issue are still ongoing.
- identified Oct 21, 2025, 02:10 PM UTC
We are seeing services return to normal, including dashboard access and calls. Services such as chat and soft phone applications are being restored incrementally, and we expect all services to resume normal operation within the next 20 minutes. Some backend services, such as CRM integrations and voicemail notifications, will be restored later this evening
- monitoring Oct 22, 2025, 06:29 AM UTC
Update - Services have been restored to handsets, mobile and desktop applications, and we're working on isolated cases of issues with dashboard access.
- monitoring Oct 22, 2025, 06:30 AM UTC
Dashboard access is also fully operational, and we will continue to monitor this incident for a prolonged period before marking it as resolved.
- resolved Oct 22, 2025, 09:51 AM UTC
This issue has been confirmed resolved and all services are now restored. We are awaiting an RFO to provide regarding this outage.
Device Login issues
Affected: Telephone SystemE-mailSentinel Data Solutions WebsiteSentinel CloudDirect Debit PaymentsSentinel VoiceCloudflare Manchester, United Kingdom - (MAN)
Timeline · 3 updates
- monitoring Oct 20, 2025, 10:12 AM UTC
Good Morning, A Global outage which has caused issues with Amazon Web Services (AWS) and its customers, our suppliers, is believed to be resolved, services such as web hosting, DNS, Anti-Virus, connectivity... The outage has caused problems with logging into Windows Devices as well as delays in Windows update services. We believe that the issue has now been resolved, if your still experiencing a problem please restart your machine and then login again, failing that please contact us. Kind regards, Sentinel Support
- monitoring Oct 20, 2025, 10:21 AM UTC
We are continuing to monitor for any further issues.
- resolved Oct 20, 2025, 01:46 PM UTC
We understand that the AWS outage has now been resolved. We can see all service are up and running, we are however aware of some services running slowly as they clear the backlog. For further information please follow the BBC news feed https://www.bbc.co.uk/news/live/c5y8k7k6v1rt
VoiP Outbound calling & load faults
Affected: Telephone System
Timeline · 5 updates
- investigating Jul 30, 2025, 09:58 AM UTC
Issues with making outbound calls have been found and are currently under investigation.
- investigating Jul 30, 2025, 09:59 AM UTC
We are continuing to investigate this issue.
- investigating Jul 30, 2025, 10:01 AM UTC
We are continuing to investigate this issue.
- monitoring Jul 30, 2025, 10:23 AM UTC
The fault has been identifed and services now are beggining to be restored. This will be monitored until we can confirm the issue is resolved.
- resolved Jul 30, 2025, 11:51 AM UTC
All VoiP services should now be restored.
Callswitch Outbound Calling
Affected: Telephone SystemSentinel Voice
Timeline · 7 updates
- investigating Jul 11, 2025, 11:11 AM UTC
We are aware of an issue with Callswitch and Outbound calls. It's with our Third Party Provider and currently investigating the issue. We will keep you updated on the progress
- investigating Jul 11, 2025, 11:12 AM UTC
We are continuing to investigate this issue.
- investigating Jul 11, 2025, 11:24 AM UTC
Our supplier has identified the issue and is looking to implement the fix asap
- identified Jul 11, 2025, 11:33 AM UTC
Third Party - We are still working on this issue and have seen calls returning to normal in some cases. We are working on reports of issues with chat via our softphone applications.
- monitoring Jul 11, 2025, 11:43 AM UTC
We have seen all services return to normal and are actively monitoring the issue.
- monitoring Jul 11, 2025, 02:43 PM UTC
We are continuing to monitor the situation, but it looks like it has been resolved. If you are still affected, then we would suggest rebooting the app/PC, signing out and back in, while checking the headset connection.
- resolved Jul 14, 2025, 07:10 AM UTC
Everything now is resolved
Global Inbound and Outbound Phone issues
Affected: Telephone System
Timeline · 6 updates
- investigating Jul 09, 2025, 10:36 AM UTC
We are currently investigating an global phone issue with calls being silent inbound, outbound and internal calls. This will effect desk and softphones.
- identified Jul 09, 2025, 10:44 AM UTC
Phone traffic is being rerouted and calls should shortly be operational.
- monitoring Jul 09, 2025, 10:55 AM UTC
Most phone services should now be restored. The situation is being monitored for any continued faults.
- identified Jul 09, 2025, 11:51 AM UTC
Further identified issues have been reported, this is being investigated further.
- monitoring Jul 09, 2025, 08:00 PM UTC
A fix has been implemented and we are monitoring the situation.
- resolved Jul 10, 2025, 09:08 AM UTC
This incident has been confirmed to be resolved and services should now fully resume.
Website performance
Timeline · 2 updates
- identified May 07, 2025, 02:13 PM UTC
We are aware of problems with website performance and are investigating. The latency issues have been escallated with our upstream provider. Further updates will be made when availabile.
- resolved May 08, 2025, 08:03 AM UTC
There was a problem with our upstream provider. The issue has been resolved. We are reviewing our infrastructure to ensure that this doesn’t happen again.
Compromised email
Timeline · 3 updates
- identified Mar 25, 2025, 11:48 AM UTC
We understand that an email has gone out from Matthew with a PDF. Please ignore and delete this email and if you have opened can you get in contact with support.
- monitoring Mar 25, 2025, 04:31 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Mar 31, 2025, 02:30 PM UTC
The offending email has been blocked from all Microsoft tenants and deleted from Outlook.
Telephony intermittent outage
Affected: Telephone System
Timeline · 3 updates
- investigating Mar 11, 2025, 10:19 AM UTC
We're aware of an issue with our upstream provider whereby a caller will continue to hear the telephone ring even when the call has been answered. The recipient of the call can only hear silience. We've raised this with our upstream provider who are investigation. Further updates to follow..
- monitoring Mar 11, 2025, 11:29 AM UTC
Traffic has been returning to normal levels in most areas of our network. We'll continue to monitor and provide further updates within one hour.
- resolved Mar 11, 2025, 12:06 PM UTC
The telephony issue has now been resolved. We'll continue to monitor the service with our upstream provider over the next 24 hours. Sorry for the inconvenience that this may have caused.
Microsoft Office Outage
Affected: Telephone SystemE-mail
Timeline · 4 updates
- investigating Jan 17, 2025, 08:22 AM UTC
Good morning, we are aware of an issue with Microsoft Office. We're currently working with Microsoft to find a resolution. Further updates to follow.
- investigating Jan 17, 2025, 09:45 AM UTC
Microsoft have provided a resolution. We're working on deploying the fix.. We'll be in contact shortly..
- investigating Jan 17, 2025, 11:43 AM UTC
We are continuing to investigate this issue.
- resolved Jan 17, 2025, 11:51 AM UTC
The problems with Microsoft Office have been resolved. If your experiencing any further issues, please call 01425 527014
CallSwitch Call Dropouts
Affected: Telephone SystemSentinel Voice
Timeline · 2 updates
- investigating Nov 22, 2024, 12:46 PM UTC
We have had some reports of blank calls and calls dropping out. We are currently investigating this with our upstream providers and will update as soon as possible.
- resolved Nov 22, 2024, 04:19 PM UTC
The issue seemed to affect our internal telephone system primarily. We haven't had any further reports of issues and our calls have returned to normal.
Phone System Issue
Affected: Telephone System
Timeline · 4 updates
- investigating Aug 12, 2024, 01:41 PM UTC
We are currently investigating the ongoing issue regarding communication issues regarding calls in and out. We are working with our supplier to get this resolved as quickly as possible
- investigating Aug 12, 2024, 02:13 PM UTC
We are currently investigating the ongoing issue regarding communication issues regarding calls in and out. We are awaiting confirmation with our 3rd party provider on a resolution. Thank you for your patience on this.
- monitoring Aug 12, 2024, 02:24 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Aug 12, 2024, 02:57 PM UTC
This has been resolved from our supplier. If you have any concerns or issues please get back to us. Again thank you for your patience during this.
Telephone Outage
Affected: Sentinel Voice
Timeline · 4 updates
- investigating Aug 07, 2024, 12:18 PM UTC
Good afternoon, There is a telephone outage affecting a number of customers at the moment. It appears that outbound calling is not working, and some inbound calls are not being received. We’ve raised the problem with our upstream provider who are treating this as a high priority and expect an update in the next 15 minutes. Sorry for the inconvenience that this is causing.
- monitoring Aug 07, 2024, 12:26 PM UTC
The upstream provider engineers have identified the problem and are implementing a solution. We estimate full resumption of service within the next 15 minutes
- monitoring Aug 07, 2024, 12:45 PM UTC
We are continuing to monitor for any further issues.
- resolved Aug 07, 2024, 12:46 PM UTC
We believe that the telephone issue has now been resolved by the upstream provider. Once again, sorry for the inconvenience that this has caused.
Global Microsoft Outage
Timeline · 5 updates
- investigating Jul 19, 2024, 08:25 AM UTC
Microsoft are currently experiencing a Global outage. "Users may be unable to access various Microsoft 365 apps and services" Access to the Sentinel will be unaffected however the following products may be problematic. Impacted services may include but are not limited to the following: - PowerBI: Users may notice that their service is in read-only mode while we address impact. - Microsoft Fabric: Users may notice that their service is in read-only mode while we address impact. - Microsoft Teams: Users may be unable to leverage Microsoft Teams functions including presence, group chats, and user registration. - Microsoft 365 admin center: Admins may be intermittently unable to access the Microsoft 365 admin center and any action may be delayed if accessible. - Microsoft Purview: Users will see a delay in events being processed in Microsoft Purview. We'll update you as soon as we receive further information from Microsoft.
- investigating Jul 19, 2024, 01:14 PM UTC
We are continuing to investigate this issue.
- monitoring Jul 19, 2024, 01:20 PM UTC
The issues reported in the news today have not affected Sentinel Customers. We do however expect latency within Microsoft Teams while Microsoft and other Crowdstrike customers resolve the problem.
- monitoring Jul 22, 2024, 07:00 AM UTC
We are continuing to monitor for any further issues.
- resolved Jul 22, 2024, 07:01 AM UTC
Normal service has resumed.