Exclaimer outage history

We’ve identified an issue affecting directory synchronisation for customers in the EU region. Synchronisation is temporarily paused while our engineers resolve it. User data that was already synced shouldn’t be affected, but changes to user data and newly added users won’t sync until it resumes, and the Synchronise button in the portal may stay on “In progress”. Customers setting up Exclaimer for the first time will also be affected, because their initial user sync won’t complete until then. We’re aiming to restart synchronisation tonight, and we expect data to be up to date by the morning of 27 October. This is our current estimate, and we’ll post an update as soon as syncing has resumed.

Exclaimer Engineers are continuing work to address the impacted service. Please note that any user data previously synchronized with Exclaimer will remain unaffected. However, any updates to user information or the addition of new users will not be reflected in signatures until the issue is resolved.

Exclaimer Engineers are aware of a possible issue that is preventing some subscriptions from accessing the Exclaimer Portal. The cause is currently being investigated, and more information will be shared shortly.

Exclaimer Engineers are taking action to restore the service to full operation at this time. We have been able to confirm that signatures being applied through Client-side and Server-side methods are continuing to apply as expected.

We've restored access to the Exclaimer admin portal and management pages for the UAE region by redirecting traffic to our secondary UAE infrastructure. Our checks show the pages loading normally again. We're continuing to monitor while we investigate the underlying cause. Email signature delivery wasn't affected. We'll post another update when we have more information.

The cause of the issue has been identified, and mitigation has been applied to restore full access to the User Interface for impacted customers.

Exclaimer Engineers have confirmed that the incident has been resolved. The issue was caused by a Cloudflare incident (https://www.cloudflarestatus.com/incidents/ryvhi2suec0d) affecting connectivity between Cloudflare and Azure that prevented routing traffic to one of our available UAE Datacenters, which remained healthy throughout. Exclaimer Engineers worked around the issue by routing traffic away from the impacted route until Cloudflare had resolved the issue and all traffic is now routing as normal following testing and a period of extended monitoring. If you have any questions or concerns, please reach out to our great support team, who will be more than happy to help answer any questions.

Exclaimer engineers are investigating a delivery delay affecting some messages sent from Outlook and Exchange to Exclaimer Cloud. Some of these messages may be retried by the sender and may appear as temporary deferrals rather than delivery failures. We are not currently aware of any confirmed message loss and will provide updates as we learn more.

Exclaimer has identified that a small subset of messages (~0.02%) are delayed when routed through Exclaimer due to a suspected issue within Microsoft's servers. This has been raised with Microsoft to investigate alongside Exclaimer Engineers. Sent messages will be received with a signature applied, as expected. If you are seeing issues with message deliverability, please reach out to our support team, who will be happy to assist.

Mail delivery has resumed as normal and our engineers are seeing significantly less errors. The team are awaiting confirmation of a fix implemented on Microsoft servers and will be monitoring until tomorrow morning to confirm.

The original impact of the issue has been mitigated by Microsoft changes. Exclaimer Engineers are continuing to work together with Microsoft to establish a root cause. If you have any questions or concerns, please reach out to our great support team, who will be more than happy to help answer any questions.

Exclaimer engineers are investigating a delivery delay affecting some messages sent from Gmail/Google Workspace to Exclaimer Cloud. Some of these messages may be retried by the sender and may appear as temporary deferrals rather than delivery failures. We are not currently aware of any confirmed message loss and will provide updates as we learn more.

We are continuing to investigate this issue.

Our engineers have confirmed this issue was caused by a change on Google's side, that we have implemented a code change to mitigate and will continue to work with Google to address the issue.

This incident has been resolved.

Engineers have applied a mitigation for the issue affecting mail processing that began at 14:37 UTC. Some messages experienced delays while imprinting was retried, and a small number of messages may have been sent without a signature applied. Our engineering team is continuing to monitor performance to confirm full recovery.

Email signature delivery is operating normally in the US again after mitigation by engineers. Between 14:20 and 14:54 UTC, customers may have experienced some minor delays whilst imprinting was retried internally and a small number of messages may have been delivered without a signature applied. We apologise for any disruption caused.

Exclaimer support staff are currently addressing an issue that is affecting the delivery of email responses from our support team. If you have an ongoing support ticket, you can log in to the support portal to check for any potential updates and reply to the support engineer assigned to your case. You can access your current tickets and respond to the assigned Support Engineer by following the steps outlined in this guide: https://support.exclaimer.com/hc/en-gb/articles/9389259466141

Exclaimer staff have made an internal change, and monitoring indicates that the issue has now been completely resolved. If you have an open ticket with our support team and have not received a response this week, please follow up on your case via email or directly through our web portal. To access your current tickets and reply to our support team, please follow the steps provided in this guide: https://support.exclaimer.com/hc/en-gb/articles/9389259466141.

Engineers are aware of an issue affecting the Signature Designer, which is preventing some customers from editing signature templates. There is no impact to mail flow or signature delivery at this time. We are investigating and will provide a further update within 60 minutes.

Exclaimer engineers have resolved the issue, and customers should no longer experience any issues when using the Signature Designer. We are now monitoring for any further issues.

Engineers have confirmed that the previous service alert has been resolved. The service is now back to full health and is working as normal. Thank you for your patience.

Exclaimer Engineers are aware of a transient issue that may cause certain pages, such as Branding, Campaigns, and Disclaimers, to fail to load for customers within the Exclaimer Portal. Remediation work is underway to restore access to these sections of the portal. Signatures are still being applied to Emails. If you are seeing that signatures are not being applied, please contact our support team, who will be happy to help.

Our engineers have resolved the issue, and customers should no longer experience any issues when using the Exclaimer Cloud Portal. We are now monitoring to ensure stability remains. If you are continuing to see issues, please don't hesitate to contact our support team, who will be happy to help.

Exclaimer Engineers are aware of reports of the Signature Designer failing to load for some customers. Initial remediation actions have been taken, and the Signature Designer should now load as expected for users. We are investigating the cause of the issue now

We have identified an issue within the portal where some buttons are not responding to clicks for some users. Engineers are working now to resolve the issue.

Engineers have been able to resolve the issue and have resumed monitoring for any further issues.

Our engineers have monitored over the evening and confirmed this is now resolved

Exclaimer Engineers are investigating an issue within the UK that is preventing data from synchronizing to Exclaimer correctly. Initial reviews indicate the issue is only impacting UK-based subscriptions

After an initial investigation, the issue appears to be widespread; engineers are mobilizing fully to address the service issue. User data that has been synchronized to Exclaimer previously will continue to be displayed as expected.

Exclaimer Engineers have identified the cause of the error, and initial attempts to remediate the issue have not been successful at this time. The team is continuing to work to resolve the error. User data that has been synchronized to Exclaimer previously will continue to be displayed as expected. Another update will be provided within the next hour.

Engineers have been able to identify and confirm a fix and are implementing it in all impacted regions now.

Exclaimer engineers have now applied the fix to all impacted regions and have confirmed that data is synchronizing as expected for subscriptions. We are now continuing to monitor for any unexpected issues.

No further signs or unexpected errors have occurred since the remediation action was taken, and user data is now synchronising to Exclaimer as expected. If you are seeing issues with user information not appearing within Exclaimer as expected, please attempt to manually synchronise user data from within the Exclaimer Portal.

We are currently seeing an increase in imprint failures for messages processed in the US1 datacenter.

We have identified an issue with the auto scaling on key services. These have been manually scaled and we are seeing recovery.

Imprinting has now recovered and is operationsl once more. Engineers will continue to monitor the situation.

This incident has been resolved.

Exclaimer Engineers are investigating a potential mail flow delivery issue within the US region at this time. Preventive action has been taken to mitigate the issue, and more information will be provided when possible.

The applied preventive messages have effectively stabilized the potential delay. Engineers are continuing to monitor for any signs of further issues.

Our engineers monitored over the weekend and mail flow as been progressing as normal.

We are currently investigating recurring instability affecting our US region Postgres database infrastructure. This is caused by an underlying Azure infrastructure issue (Tracking ID: SRV7-K0G). Some US customers may experience intermittent issues with Active Directory sync and the admin user interface during this window. We are working with Microsoft Azure to resolve this as quickly as possible. We will provide updates every 30 minutes. Started: 25 Jul 2026, 22:20 BST

We are continuing to investigate this issue.

The issue has been identified and a fix is being implemented. Email delivery and signature application are not affected and continue to operate normally. No customer data has been lost. Following the previous incident in US on July 23rd one of the database replicas did not recover normally after the outage was resolved, and because of this storage was quickly used up on the primary database server. Recovery is in progress and replication is catching up slowly, we expect this to happen over the course of Sunday. The impacts noted still apply as we have temporarily paused data synchronisation attempts (including SCIM and HRIS) in order to complete recovery. We will provide the next update within 12 hours.

Update - 26 Jul 2026, 10:15 BST Database recovery has completed overnight ahead of schedule. Storage has returned to normal levels and replication is fully caught up. We are currently in the process of re-enabling paused services. We will update the affected components to Operational once services have been fully restored. Email delivery and signature application continue to operate normally.

Update - 26 Jul 2026, 16:25 BST All services have been fully restored. Database storage and replication are healthy. Data synchronisation (SCIM, HRIS) has resumed normally. No customer data was lost. We apologise for any inconvenience caused.

We are currently experiencing issues with email signature delivery for customers in the US region due to an underlying Azure infrastructure issue in West US. Emails are being delivered but signatures may not be applied during this window. We are actively working to restore full service and will provide updates every 30 minutes.

We are continuing to investigate this issue.

Update - 23 Jul 2026, 17:20 BST We continue to investigate an issue affecting email signature delivery for customers in the US region, caused by an external Azure infrastructure issue in West US. Email is still being delivered. Signatures may intermittently not be applied during this window. We have scaled our US infrastructure and are actively working to restore full service.

Update - 23 Jul 2026, 18:15 BST We have restored email signature delivery for customers in the US region. Emails are now being delivered with signatures applied. We are continuing to monitor the situation while Microsoft investigate the underlying Azure West US infrastructure issue. We will provide a further update if any impact is detected. We apologise for any inconvenience caused.

Email signature delivery has been restored for customers in the US region. While the underlying issue was with Azure's West US infrastructure, we made adjustments to our systems to mitigate the impact and maintain service during the outage. We are continuing to monitor the situation while Microsoft investigate the underlying Azure West US infrastructure issue.

Email signature delivery has been restored for customers in the US region. While the underlying issue was with Azure's West US infrastructure, we made adjustments to our systems to mitigate the impact and maintain service during the outage. We are continuing to monitor the situation. Please contact support if you experience any further issues. We apologise for any inconvenience caused.

Update - 24 Jul 2026, 09:30 BST All services have been fully restored across the US region. Email signature delivery is operating normally in both US datacenters following the Azure West US infrastructure outage on 23 July 2026. We apologise for any disruption caused.

Exclaimer Engineers are investigating an issue where some customers may receive an 'unexpected error occurred' page when attempting to navigate to the Signatures, Campaigns, or Disclaimers tabs. If you are experiencing this issue, please raise a support ticket using the link below. https://support.exclaimer.com/hc/en-gb/p/raise-ticket Signatures are continuing to be applied as expected to messages through both the mail flow rule and the Exclaimer add-in.

Exclaimer Engineers have identified the cause of the issue and are implementing changes to address the cause. We have also verified that this issue affected a small subset of customers.

A successful change has addressed the issue, including mitigation to prevent the issue from occurring again. Customers should no longer see any error messages or encounter any issues when accessing the Signatures, Campaigns, or Disclaimers tabs. If you are experiencing any issues with the Exclaimer Portal, please raise a support ticket, and our team will be happy to help https://support.exclaimer.com/hc/en-gb/p/raise-ticket

Exclaimer engineers are aware of an issue where messages within the UK may be impacted and fail to be delivered at this time. The team is actively working to address the issue

Exclaimer engineers have applied a fix to address the issue, ensuring no further messages will be affected. Any messages that were impacted would have been deferred for delivery and would be sent rather than failing to be delivered entirely. We will continue to monitor and provide further updates in the next hour.

The issue is now resolved and the all mail flow processing is operational

We were alerted to an issue with mail flow in our primary data centers. Our engineers are currently investigating and trying to resolve asap

Our engineers have identified the issue and are mitigating. Customers may still experience delays in mail delivery

We have mitigated the issue and mail flow is working again in all regions. We are monitoring now to ensure this has resolved the issue.

The incident has been resolved by our engineers and mail routing is operational across all regions. Customers may have experience mail delivery delays but these would have been delivered following retries.

Exclaimer is aware of an issue that may cause problems when attempting to purchase and set up Exclaimer Cloud via the Microsoft Marketplace at this time. Starting a Trial, or purchasing through an authorized reseller or directly from Exclaimer, is working as expected. More information will be provided once it is available.

Customers are now able to purchase and set up via Microsoft marketplace again. There was a latent configuration issue within our Microsoft tenant that only became a problem recently. We are still investigating what changed Microsoft side that lead to this becoming an issue.

Customers in the AU and US may experience issues with emails being quarantined by Microsoft defender due to false positive phishing detection. Our engineers are working with Microsoft to have the domain reputation cleared as soon as possible.

Our engineers have escalated the urgency of this with Microsoft and continue to push for updates as soon as possible.

Our engineers are continuing to engage with Microsoft regarding this issue and escalating to highest priority. This is only affecting mail flow of customers that are using the Engagement analytics feature. Customers can disable the Analytics feature within the Exclaimer Portal manually or contact Exclaimer Support for assistance.

Exclaimer Engineers, in cooperation with Microsoft, have been able to update their detection system to prevent our analytic links from being incorrectly identified as phishing. This change should complete replication through Microsoft 365 over the next 24 hours. Customers who have disabled analytics within the Exclaimer Portal can look to enable the Analytics feature within the Exclaimer Portal or contact Exclaimer Support for assistance if needed. We will provide another update tomorrow or when more information is available.

After extended monitoring, Exclaimer engineers are no longer seeing any continued instances of click-tracking links within the impacted regions being flagged by Microsoft Defender at this time. Customers who previously disabled this feature can look to enable click-tracking analytics from within the Exclaimer Cloud portal. If you are continuing to see issues, please don't hesitate to reach out to our support team, who will be able to assist.

Exclaimer engineers are aware of an issue causing some images not to appear within the signature tester result when a test is run. The same images appear as expected in the signature designer and in live messages. There is no impact on email signatures, as these images are applied as expected.

This incident has been resolved. Web-hosted images in the signature editor are now loading correctly across all regions. A recent update to the cloud UI's Content Security Policy inadvertently restricted external image sources, causing hosted images to fail to display. The policy has been updated to allow the required image sources, and the fix has been deployed to all production regions. We're monitoring to confirm stability. We apologize for any disruption this caused.

Exclaimer Engineers are aware of an issue that may cause messages to be delayed when sent to Exclaimer Cloud for Microsoft 365 users in the UK. More information will be provided once it is available.

Exclaimer Engineers have made a change in the UK region to prevent messages from being delivered to the affected servers. This should prevent further messages from being impacted and ensure that impacted messages are processed as expected on the next attempt.

Exclaimer Engineers have confirmed that the error rate is now dropping after a spike in both UK regions, suggesting that other actions taken have been able to address the issue. We are continuing to look into the cause whilst monitoring for any further issues.

After continued monitoring, we have confirmed the issue is no longer occurring. Servers that were displaying errors have been removed and replaced within our UK region to prevent the issue from reoccurring. If you are still seeing issues with mail flow when using Exclaimer at this time, please reach out to our support team directly, who will be happy to help.