During the latest project i was involved in, we wanted to show SharePoint v3 pages in Outlook using sitemap customizations in CRM. This worked great at first (we didn’t really test it), but after a while, when we started using it a bit more we sometimes got the following error message “MSO.DLL is not compatible with Outlook”, ending with an OK-button. Pressing it, made Outlook exit in error. Not very nice.
I don’t know exactly why this happened but I think it happens due to the loading of some active-X components that are not supported by the web browser in Outlook, which for some reason doesn’t seem to be IE. If anyone knows anything more about this, please let me know.
Oh, I forgot, we were using Outlook 2003 since V3C isn’t publicly released yet. Perhaps you won’t get this error if using Outlook 2007 since it is probably more compatible with SharePoint v3.
CRM and SharePoint Consultant