Microsoft Outlook is a prime example of a Microsoft product that stopped innovating as soon as it began dominating the Enterprise marketshare. Examples of these failings include:
- Their decades-out-of-date Spell Checker
- Their convoluted Hyper-linking process which assumes all links are intended to be linked drive files by default
- Their lack of an "All Unread" filter
- Inconsistent feature parity between desktop client/mobile client/browser clients
- Broken behavior when Rules/Filters combine Client processes and Exchange processes (Move an email into a folder (Exchange) and Mark it as read (Client))
- Inability to Import or create templates for customized Signatures (without doing this work outside of Outlook)