We are currently experiencing and issue with delivery of Email messages through our email provider(s).
The team are currently investigating the issue and will provide an update soon.
Thank you for you patience.
OASIS Product Team
We identified the issue causing the issues with OASIS and currently implementing an appropriate mitigation.
We will continue to monitor this issue over the next few hours.
Thank you for you patience.
OASIS Product Team
We now have more detail on the cause of the email delays.
Our sending logs show that Microsoft mail servers are temporarily rejecting incoming messages from our provider with the following responses:
451 4.3.2 Temporary server error. Please try again later
451 4.7.500 Server busy. Please try again later
Both of these are temporary deferrals issued by Microsoft rather than permanent failures. They instruct the sending server to hold the message and retry, which is what is producing the delays being seen.
This confirms the issue sits with delivery into Microsoft hosted mailboxes and not with our platform or with our sending provider. It is consistent with the delays continuing after we moved from AuthSMTP to SMTP2GO.
Email is not being lost. Deferred messages remain queued and are retried automatically until Microsoft accepts them. SMTP2GO is continuing to raise and track this with Microsoft.
We will post a further update as the situation changes.
OASIS Product Team
Email delivery has returned to normal. Microsoft has accepted responsibility for the current email delays. More details can be found on their status page and below:
Issue ID: EX1467029
Affected services: Exchange Online
Status: Service degradation
Issue type: Incident
Start time: Sep 4, 2026, 10:19 PM GMT+12
Microsoft is no longer deferring messages from our sending provider, and the queue of delayed messages has now cleared. Delivery times to Microsoft hosted mailboxes are back within expected levels.
Summary of the incident: outbound email began experiencing delivery problems while sending was handled by AuthSMTP. We moved sending to SMTP2GO, which improved delivery for a period before delays returned. Sending logs confirmed that Microsoft mail servers were temporarily deferring messages with 451 4.3.2 Temporary server error and 451 4.7.500 Server busy. These were temporary responses on the Microsoft side that caused messages to be queued and retried rather than failing.
No email was lost during the incident. Messages that were delayed have since been delivered, although some may have arrived out of order or later than the time they were sent.
OASIS Product Team
We are aware users are experiencing increased error messages with OASIS from our internal monitoring system.
The team identified routine internal maintenance process not operating as expected.
OASIS Product Team
All systems now operational.
The root cause was a scaling operation which triggered an SQL instance restart, an operation which often happens during Microsoft's maintenance window without service interruption.
An ongoing process triggered a protection mechanism called rapid fail protection disabled the applications as a result of excessive error reporting.
We apologise for any inconvenience.
OASIS Product Team
We are aware users are experiencing access issues with OASIS and reports we have received from clients directly.
This will be observable when interacting with OASIS by saving and navigating around.
We are investigating the issue which we currently believe to be related to a Cloudflare outage.
We will provide an update soon.
OASIS Product Team
We identified the issue causing the access issue with OASIS, it relates to a Cloudflare outage. They haven't formally acknowledged this on their status portal but they are having ongoing issues.
OASIS is sporadically accessible we will continue to monitor any update from Cloudflare.
Thank you for you patience.
OASIS Product Team
Cloudflare have provided an update on their status page acknowledging a global network issues. Cloudflare Status
We will continue to monitor the progress and provide updates as necessary.
OASIS Product Team
OASIS is continuing to experience sporadic access issues as a result of the Cloudflare outage.
There have been an number of updates on the Cloudflare status page indicating they are seeing services recover as they continue remediation efforts. Cloudflare Status - Cloudflare Global Network experiencing issues
We will provide further updates as soon as we have them.
OASIS Product Team
Cloudflare have identified the issue impacting on their global network outage and are currently implementing a fix. Cloudflare Status - Cloudflare Global Network experiencing issues
We will provide further updates as they are available to us.
OASIS Product Team
We have received confirmation from Cloudflare that their global network issue has been resolved. OASIS services are now fully available and users are able to access the platform again.
This incident will remain open in a monitoring phase so that we can keep you informed of any changes to the current status as it remains open and being monitored by Cloudflare.
Cloudflare is a fundamental part of how the modern internet operates. Their infrastructure supports a very large proportion of global internet traffic and underpins the delivery of countless online services. As a result, issues within their network, although rare, can have far reaching effects that extend well beyond any single provider. While we allowed Cloudflare the necessary time to restore their systems, we were also preparing internally and assessing our options should the disruption have continued for a longer period.
We appreciate your patience throughout this incident.
OASIS Product Team
Following monitoring we are marking this issue as resolved as Cloudflare have closed of the issue.
OASIS Product Team
We have been made aware the OASIS report wizard is not applying filters correctly. The issue has been identified and will apply a patch to OASIS this evening.
We apologise for any inconvenience this has caused and will provide an update when a fix for this is deployed tonight.
OASIS Product Team
We have deployed the OASIS Report Wizard fixes to OASIS so filters should be apply correctly now.
OASIS Product Team
We will be performing planned maintenance on OASIS to install the renewed SSL certificate for the following domains:
- app.oasiscloud.co.uk
- secure.oasiscloud.co.uk
- analytics.oasiscloud.co.uk
- docs.oasiscloud.co.uk
Affected Services
OASIS Application
OASIS Document Services
OASIS Analytics
Reason for Maintenance
Renew the application SSL certificate.
Additional Information
During this maintenance window, we are not expecting any downtime. However, during the certificate swap users may be presented with certificate warning until the certificates have propagated.
Planned maintenance has completed
We will be performing planned maintenance on the Azure infrastructure to migrated some services which are being deprecated on the 30th of September by Microsoft which relate to Basic IP Address upgrades to Standard SKU.
During this maintenance window, we are not anticipating any downtime. The work is being carried out by Rackspace and IT Works will be available to verify upgrade completion and rollback decision making should the IP address upgrade be unsuccessful.
Affected Services:
-
VPN Gateway services between UK West and UK South data centres
Impact Level:
We are not anticipating any downtime as the upgrade does not impact on public facing services of OASIS.
Reason for Maintenance:
Microsoft are deprecating Basic IP address in Azure to Standard IP Addresses Upgrade Basic Public IP Address to Standard SKU in Azure | Microsoft Learn.
Additional Information:
The maintenance window is 1 hour with the potential to extend a further 2 hours if required.
OASIS Product Team
Planned maintenance has been completed.
OASIS Product Team
We are aware of an issue in OASIS when an organisation is using the functionality to stream documents for compatible files types is enabled. This issue will present as an error when you click on the uploaded document.
Our team are currently looking into this and will provide an update in the next hour.
Thank you for your patience.
OASIS Product Team
This issue has been resolved.
OASIS Product Team
We will be conducting some unplanned maintenance at 00:45 to deploy updates to some components used by OASIS to patch some issues we are observing.
These updates will cause a temporary disruption to page requests until the user navigates to another page.
We apologise for the short notice.
OASIS Product Team
We have start the update preparation work. We we expect to roll out the update in the next 10 minutes or so.
Thank you for your patience.
OASIS Product Team
The update process has been completed. Due to the nature of the updates we will be monitoring the platform throughout Friday and will apply any patches as required.
OASIS Product Team
We are aware users are experiencing performance issues with OASIS from our internal monitoring system and reports we have received from clients directly.
This will be observable when interacting with OASIS by saving and navigating around or an increased number of application errors presenting to users.
The team are currently working to identify the the cause of the performance issue and will provide an update to the incident soon.
OASIS Product Team
We identified the issue causing the performance issues with OASIS today. It relates to the weekly full back up processes in place for the databases. This is creating high data read load which is impacting the speed in which the OASIS application is able to communicate with the database. This has been exacerbated by additional patching required this morning which involved servers coming offline for updates and it takes time for the application to spool up.
Overall the performance is improving as the backup processes have moved onto smaller databases. We expect normal operations from around about 14:00. However, we will provide another update later this afternoon.
Thank you for you patience, we apologies for any interruption this may have caused.
OASIS Product Team
This issue has been marked as resolved as service performance returned to normal after further monitoring.
Thank you again for you patience, we apologies for any interruption this may have caused.
OASIS Product Team