We've confirmed that the issue is resolved after an extended period of monitoring, and receiving additional confirmations from previously impacted organizations.

We are currently experiencing delays in the delivery of emails to and from our Thinkproject Products. Please note that this affects only emails sent from or to mail accounts hosted on Microsoft 365 / Exchange Online. Emails from other mail providers are not impacted. This disruption is caused by an ongoing incident on the Microsoft 365 / Exchange Online platform and is beyond our direct control. Microsoft is actively working on a resolution. Our team is monitoring the situation closely and will update this page as soon as normal service is restored. We apologise for any inconvenience caused.