Some customers report that KanBo Outlook app doesn't show any correct labels in Outlook 2013/2013. On the other hand, in this situation everything in OWA is fine.
To solve this problem, you should add following entry as a first line just under <system.webServer> in KanBo web.config.
<httpProtocol> <customHeaders> <add name="X-UA-Compatible" value="IE=Edge" /> </customHeaders> </httpProtocol>
More information about problem can be found here: http://social.technet.microsoft.com/wiki/contents/articles/24276.sharepoint-2013-troubleshooting-object-doesn-t-support-property-or-method-addeventlistener-or-getattribute.aspx
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