OWA error 0x80040154 when sending encrypted email

windows

Symptoms

Cannot send encrypted email; error 0x80040154 appears.

Likely cause

Malwarebytes is blocking IE VBScript.

Fix

1. Quick test: right-click Malwarebytes in the tray and exit it. 2. Permanent: Open Malwarebytes > Settings > Protection > Advanced Settings > Application Hardening tab > untick 'Disable Internet Explorer VB Scripting' under Browsers > Apply.

Sourced from militarycac.com. Rewritten for clarity.

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