Upgraded CRM server from 2013 to 2015. Updated the plugin to 2015. The outlook plugin throws the following exception regularly. Uninstalled/reinstalled and continue to receive the error, including the script error dialog box while in Outlook viewing CRM.
[2015-08-24 12:11:56.058] Process:OUTLOOK |Organization:5bfb100f-4d08-e411-80be-00155d014301 |Thread: 1 |Category: Application.Outlook |User: 00000000-0000-0000-0000-000000000000 |Level: Error |ReqId: 00000000-0000-0000-0000-000000000000 | <>c__DisplayClass19.<ExecuteScriptFunction>b__16 ilOffset = 0x3C
at <>c__DisplayClass19.<ExecuteScriptFunction>b__16() ilOffset = 0x3C
at ExceptionFilter.TryFilterAllCatch(Func`1 body, Action`1 filter, TResult resultIfFailed) ilOffset = 0x15
at <>c__DisplayClass19.<ExecuteScriptFunction>b__15() ilOffset = 0x55
at RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) ilOffset = 0xFFFFFFFF
at RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) ilOffset = 0x34
at Delegate.DynamicInvokeImpl(Object[] args) ilOffset = 0x2A
at Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme) ilOffset = 0x47
at Control.InvokeMarshaledCallbackHelper(Object obj) ilOffset = 0x35
at Control.InvokeMarshaledCallback(ThreadMethodEntry tme) ilOffset = 0x0
at Control.InvokeMarshaledCallbacks() ilOffset = 0x63
at Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous) ilOffset = 0xFC
at Control.Invoke(Delegate method, Object[] args) ilOffset = 0x17
at OutlookInstanceCache.MainThreadInvoke(Delegate method) ilOffset = 0x22
at CrmPageContext.ExecuteScriptFunction(String functionName, Object[] arguments) ilOffset = 0x4B
at CrmOutlookWebContextExtensionMethods.ExecuteScriptFunctionAndCatchWebContextExceptions(ICrmOutlookWebContext context, String functionName, Object[] arguments) ilOffset = 0x20
at RibbonActionHandler.GetVisibleTabs(IList`1 tabs) ilOffset = 0x73
at ExplorerWrapper.GetServerRibbonTabsVisible(IList`1 tabs) ilOffset = 0x64
at RibbonActionHandlerExplorer.DetermineCurrentCrmTabs() ilOffset = 0x265
at RibbonActionHandlerExplorer.RequestDetermineCurrentCrmTabs() ilOffset = 0xF
at ExplorerWrapper.RefreshRibbon() ilOffset = 0x45
at RibbonActionHandlerExplorer.OnReady() ilOffset = 0x47
at RibbonActionHandler.UpdateReadyState() ilOffset = 0x38
at CrmPageContext.CheckNavigationProgress() ilOffset = 0x19C
at CrmPageContext.TopLevelDocumentComplete() ilOffset = 0x37
at CrmOutlookWebBrowser.<CrmOutlookWebBrowser_DocumentComplete>b__10() ilOffset = 0x63
at ExceptionFilter.TryFilterAllCatch(Action body, Action`1 filter) ilOffset = 0xF
at AxWebBrowserEventMulticaster.DocumentComplete(Object pDisp, Object& uRL) ilOffset = 0x1B
at RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) ilOffset = 0xFFFFFFFF
at RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) ilOffset = 0x25
at RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) ilOffset = 0xCF
>ExecuteScriptFunction 'AreRibbonTabsVisibleOutlook' args '|NoRelationship||Mscrm.BasicHomeTabMscrm.BasicHomeTab' failed to execute the function because it does not exist in the page at location crm01/.../stage.aspx;url=SiteMapNavPage.aspx&ver=63576040294129