View your Outlook email messages arranged by conversations to see messages that share the subject line grouped together.

Select Start > Settings > Apps > Apps & features. Apps & features in Settings. Select the More icon next to the app you want to fix. Select the Advanced options link under the name of the app (some apps don't have this option). On the page that opens, select Repair if it's available.

A digitally encrypted message can only be opened by recipients who have the correct key. A digital signature assures recipients that the message hasn’t been tampered with. Notes: Outlook on the web requires a Windows desktop device to support S/MIME.