Backend API

Zivver OWA plugin degraded performance for some mailboxes


In collaboration with Microsoft, we have found that this issue is caused by configuration of a mailbox policy setting in OWA. It can be solved by disabling the OnSendAddinsEnabled setting, as is described on

As a result of disabling the setting, emails will no longer open in a pop-up window after pressing send, solving the issue.

Problem Identified

Microsoft has reintroduced behaviour in Outlook online (OWA) that causes issues with the Zivver OWA plugin.
Affected mailboxes will notice emails opening in a pop-out screen after sending the email. As a result, users may experience degraded performance. We are escalating this issue with Microsoft and will keep you updated via this page.

If you face challenges due to this issue, please reach out to