Salesforce for Outlook (SFO) system tray icon disappears
|Knowledge Article Number||000206457|
The icons for installed applications are hidden in the Windows Notification area and you would need to manually unhide them when you have hidden icons an arrow appears next to the Notification Area at the bottom right corner.
On Windows 10, see all your notification area icons by clicking the up arrow to the left of your notification area icons. Or, check Microsoft help for Windows 7.
For Windows 8 or 10, Microsoft doesn't have a similar link but there are a few great 3rd party sources that explain the details with screenshots.
Show SFO icon on the taskbar
1. Right-click an empty area on the Taskbar, and then click Properties.
4. Your SFO icon should show up in the System tray now, even if you restart your computer