Note that I encountered the below error:
"Something went wrong and your search couldn't be completed"
I just disabled the X1 Add-in and the error was gone...
Wouldn't know whether the error was caused by the add-in though, but possibly it may be related(?)
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EventID 1026
Application: X1OutlookService32.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.InvalidCastException
at X1.Outlook.Service.OutlookService.HandleException(System.Exception)
at X1.Outlook.Service.OutlookService+<>c__DisplayClass19_1.<ExecuteMAPICode>b__0()
at X1.Outlook.Service.OutlookService.MAPIThreadStart(System.Object)
at System.Threading.ThreadHelper.ThreadStart_Context(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Threading.ThreadHelper.ThreadStart(System.Object)
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