I am experiencing this problem in Outlook 2019.
If you use any of the 4-other current versions of Outlook, experience the same issue and know how to stop it, please share.
(E.g. Outlook 365, Outlook.com, Outlook App or Outlook Web App)
Specifically, the moment I type @ in the body of the message, a box covers what I am typing and tries to search my contacts.
So far, I tried unchecking all of the boxes in Outlook search options and removed Outlook from the search index.
Any other ideas?
Thank you in advance!