Microsoft released another update that is causing outlook problem. the issue is you will not be able to reply to outlook messages.
The update change in Microsoft Outlook is preventing users from creating and viewing emails in the desktop version of the email client.
Microsoft said that Outlook is suffering “email visibility issues”, with widespread reports of text disappearing after being entered into a new message, and of existing messages having no body text at all.
Users reported a variety of text input and visibility issues. There were confirmed reports of the problems impacting Australian and New Zealand users.
The solution is to disable autoupdate and rolling back to a previous version worked; Outlook Web Access (OWA) and access via phone-based client also appeared to be unaffected.