This issue was fixed in Janusseal App for Outlook version 3.19.1 that was released on 17th October 2020.
This issue affects customers with Exchange on-premise mailboxes and Janusseal App for Outlook Cloud Edition.
Depending on the environment, a selection of the following symptoms may occur:
- When a user composes an email using Outlook on the Web, and opens the Januseal App for Outlook side pane, the pane fails to load. (Exchange 2013, Exchange 2016, Exchange 2019) and reports that the add-in has been disabled.
- When a user sends an email in Outlook on the Web the cursor spins indefinitely (Exchange 2016, Exchange 2019).
- Messages can be sent without a security classification as user is not forced to classify upon send.
Janusnet has developed a code fix and deployed it to infrastructure in Australia, Europe and the US. Some affected customers will need to re-install the Janusseal App for Outlook manifest to obtain the fix; these customers will be contacted directly by Janusnet.
The issue was caused by a breaking change in the Office javascript library - https://github.com/OfficeDev/office-js/issues/1441
Affected Customers
Customers with On-Premise Exchange (2013 and later) with Janusseal App for Outlook (Cloud Edition).
Mitigating circumstances
Customers with the following environments are not affected:
- Customers using On-Premise Exchange with Janusseal App for Outlook (On-Premise Edition)
- Customers using Office 365 Exchange with Janusseal App for Outlook (Cloud Edition)
- User composing email with Win32 Outlook or Outlook Mac
Details
When a user attempts to open the side panel, an error message is displayed.
When a message is sent, the cursor spins, and the page shows the message that "Janusseal App is working on your request."
Cause
A recent update to the Microsoft Office JavaScript library limits loading of third party web addins from non-Microsoft sites to on-premise Exchange mail servers.
Current State
Janusnet has developed a code fix and deployed it to infrastructure in Australia, Europe and the US. Some affected customers will need to re-install the Janusseal App for Outlook manifest to obtain the fix; these customers will be contacted directly by Janusnet.
Work arounds
- End users should send email using Microsoft Outlook (W32)
Further Information
A status update will be sent on Monday 19 October 2020, or earlier.
This page will be updated with current status.
Note that there is evidence that other third party Office web addins are also affected.
The issue was caused by a breaking change in the Office javascript library - https://github.com/OfficeDev/office-js/issues/1441
