Using classic Outlook for Windows in business environments
Some clients are using older software that is no longer updating and can not rely on developers to create workarounds to fix a Microsoft bug. While it is great for those who are using newer software and have technical expertise, many people using older devices, software, and operating systems can not rely on this. There needs to be a wide industry standard that is followed. This issue does not affect any Gmail accounts, which indicates that it is not a client developer issue but a Microsoft issue that is not following standards.