Re-enable / Re-add SSS Add-in

Sometimes this occasionally pops up when opening Excel and a user may click "Yes" on it. If that is the case, follow this tutorial

Open Excel and go to "File" -> "Options"
On the Excel Options window, go to "Add-ins" -> "Excel Add-ins" -> "Go..."
Click the checkbox for Ssserver (if this is not appearing, click "Browse)
Point to this location: C:\Program Files\insightsoftware\Spreadsheet Server Suite\_Common\SSServer.xll (it could also be Program Files (x86))
After pointing to that location, the add-in show appear on the list, click the checkbox next to it then click "Ok"
1. If you are unable to find the add-in, there is a possibility that it is not installed on the machine. If that is the case, please contact help desk to install the program