Teamleader outage history

Two critical security vulnerabilities in PHP, a programming language used by a large share of web applications worldwide including Teamleader Focus, were made public on 20 October. Our engineering team immediately rolled out a temporary mitigation across our platform and is monitoring it closely, and we’ll apply PHP’s official patch as soon as it’s released later today. We currently have no indication that customer accounts or data have been affected, and you don’t need to do anything.

Two critical security vulnerabilities in PHP were made public on 20 October. PHP is a programming language used by a large share of web applications worldwide, including Teamleader Focus. As an extra precaution, we’ve temporarily taken Teamleader Focus offline while we apply PHP’s official security patch, and we’ll bring it back online as soon as that’s done. We currently have no indication that customer accounts or data have been affected, and we’ll keep this page updated.

Teamleader Focus is unavailable at the moment. We took it offline on purpose. Two critical vulnerabilities were made public in PHP, the programming language behind many websites and web apps worldwide, including Teamleader Focus. To stay ahead of any risk, we switched off Teamleader Focus as a preventive measure. We’re not aware of any security issues or misuse, and our team is investigating to be fully sure. When will we be back? For now, we’re aiming to make Teamleader Focus available again at 19:00 CEST. We can’t confirm yet whether that will be possible any sooner, because we first need to take the necessary steps to bring it back online safely. We’ll keep you posted on this page. Thanks for your patience, and sorry for the inconvenience.

A quick update: the official PHP security patch has been released, and our team is applying it right now. Once it’s in place and tested, we’ll bring Teamleader Focus back online. Thanks for bearing with us, we’ll let you know here as soon as Teamleader Focus is available again.

Earlier today we took Teamleader Focus offline as a precaution. The PHP foundation had announced two critical security vulnerabilities in PHP, a technology our platform runs on, and we didn't want to wait for the official fix while exposed. The official fix was released today and we have now installed it across our platform. All services are available again. Our investigation has found no evidence that these vulnerabilities were used against Teamleader. That investigation is still ongoing, and we will update this page if anything changes. Thank you for your patience. If you notice anything unusual, please contact our support team.

This incident has been resolved.

We are aware that some customers are experiencing an unexpected error when opening certain deal pages. The issue occurs intermittently and not on all deals. Our development team is actively investigating. We will provide an update as soon as we have more information.

A fix has been implemented and we are monitoring the results.

This incident has been resolved.

We are currently experiencing delays in creating tasks on projects. We're investigating the cause and will provide an update as soon as possible.

We have implemented a fix and are monitoring the results.

This incident has been resolved.

Teamleader Focus is currently experiencing a higher than normal amount of load, and may be causing pages to be slow or unresponsive. Our development team is investigating the cause and we will provide an update as soon as the issue evolves.

While we detect improvement, we are still investigating the root cause of the slowness.

This incident has been resolved, and we'll keep looking into ways to prevent this from happening again. Thank you for your patience and comprehension!

The data of the insights and shared inbox statistics have not been refreshing since October 29, 2025, 11:25 (UTC+01:00). We have found the cause and are already working on it. Thank you for your patience and understanding.

A fix has been implemented and we are monitoring the results.

This incident has been resolved. We thank you again for your understanding!

Teamleader Focus is currently unavailable We are trying to resolve this as soon as possible.

We are continuing to investigate this issue.

A fix has been implemented and we are monitoring the results.

We are continuing to monitor for any further issues.

Our development team has resolved the issue. We will keep a close eye if further issues may occur. We thank you for your patience.

We are currently investigating this issue and will update you as soon as we have more information.

The issue of slowness in Teamleader Focus has come up again. We are investigating the cause and will keep you updated.

We have identified the issue, implemented a fix and are currently monitoring the results.

The slowness issue has been tackled and resolved. Thank you for your patience and understanding.

We have noticed a general issue when sending invoices via the Peppol network. You will get an "External error" notification which will explain that the invoice could not be sent out. Receiving invoices via the Peppol network still works as expected. We are working to identify the issue.

A fix has been implemented - invoices can be sent to the Peppol network again. We suggest sending the invoices you couldn't send during the outage again via the Peppol network in order to make sure they're properly synced. We will be monitoring the functionality.

This issue has been resolved, it is now possible to send invoices via the Peppol network once again.

We noticed some of the emails sent via Teamleader Focus are not being delivered to email provider Yahoo. This means that some of your emails sent via Teamleader Focus to Yahoo e-mail addresses will arrive delayed or not at all. We're working on a solution and will continue to keep you updated

We are continuing to investigate this issue.

All e-mails that were still pending were successfully delivered. If you have received a notification that your e-mail was not delivered, you can send a new e-mail. We are monitoring this and will update you as soon as we’re certain the issue is resolved. Thanks for your comprehension.

This issue has been resolved: all e-mails are being successfully delivered again. Thanks for your patience and comprehension!

We are currently investigating an issue where tickets are not being forwarded to Teamleader Focus' Shared Inbox because of a 'block' coming from our ticketing provider. We are currently coordinating with our provider in order to solve the issue. Tickets can still be sent out from the Shared Inbox module, but replies on those tickets will not be forwarded to the Shared Inbox in Teamleader Focus. However, all the emails and replies to tickets you receive will still be in your email provider inbox, so we suggest using that to manage your emails for the time being. We will update the status page as soon as more information is available.

A fix has been implemented and tickets are again being forwarded to the Teamleader Focus' Shared Inbox. We are monitoring the situation.

The issue has been resolved: all tickets are being forwarded to the Teamleader Focus' Shared Inbox.

We have encountered an issue where segments are not visible at the moment in Teamleader Focus. We are working on showing these again as soon as possible.

The issue has been identified and a fix is being implemented.

A fix has been implemented and segments are again visible for Teamleader Focus users. We are monitoring the situation.

The issue has been resolved and segments are visible for all Teamleader Focus users.

Teamleader Focus is currently experiencing technical difficulties and may be causing certain pages to be slow or unresponsive. Our development team is investigating the cause and we will provide an update as soon as the issue evolves.

A fix has been implemented and we are monitoring the results.

This incident has been resolved.

There are currently issues with the Exchange Web Services and the Outlook upstream provider, which might impact our Outlook integrations. We are currently monitoring the situation to make sure that these services can be restored as soon as possible once available again.

We are continuing to investigate this issue.

The issue has been identified and confirmed by our 3rd party provider Microsoft. Microsoft is currently deploying and monitoring a fix which should resolve the issue shortly.

The issues with the Exchange Web Services and the Outlook upstream provider seem to have been resolved for the time being, we're monitoring the situation; our services are operational again.

The incident has been marked as resolved by Microsoft after an extensive monitoring. Everything regarding the Exchange Web Services and the Outlook upstream provider is working as expected.

Microsoft users are not able to log in via SSO, we are currently investigating the issue. Please log in with email address and password instead. We will come back with an update asap.

This incident has been resolved.

We are currently experiencing a service disruption in Teamleader Focus. Our development team is working to identify the root cause and implement a solution. We will provide an update as soon as the issue evolves.

A fix has been implemented and we are monitoring the results.

We are continuing to monitor for any further issues.

This incident has been resolved.

We are currently experiencing a service disruption on our Mobile App. Our development team is working to identify the root cause and implement a solution. We will provide an update as soon as the issue evolves.

A fix has been implemented for which we ask you to update your Teamleader Focus app. We are further monitoring the results.

This incident has been resolved.

Due to an issue with a 3rd party provider we cannot ensure correct processing of paper postal invoices. We are contacting them as we speak.

The issue has been identified, and we implemented a fix. We are monitoring whether we get the desired results.

This incident has been resolved.

There is currently an issue when uploading files in our web and mobile application. We're working on a fix and will provide an update as soon as possible.

This incident has been resolved.

InvoiceCloud and CloudSign are not loading at the moment. We're investigating the cause and will provide an update as soon as possible.

A fix has been implemented and we are monitoring the results

This incident has been resolved.

https://meeting.teamleader.eu/ is unavailable due to an expired certificate, we are investigating the cause and will get back to you asap

We were able to update the certificate and are monitoring the results

This incident has been resolved.