I can't stand the spelling and grammar autocorrect so I have it disabled. Despite that, Outlook still autocorrects my email subject lines. I've looked under Autocorrect in Prefs, and I have 'replace text as you typed' unticked.

In this panel, correct two initial capitals, capitalise first letter of sentences, days and exceptions are all ticked, but none of those affect this particular issue, which is that Outlook autocorrects my use of jargon relevant to my organisation.

Autocorrect and auto spellcheck do not happen in the body of emails because I've successfully deactivated it.

Any ideas?