More issues I'm having with MSI: a couple of my reps have been sending emails via the Outlook plugin, but those emails aren't showing up in the email tab of their MSI tab in Salesforce. In fact, if I pull a smart list of all leads who've been sent sales emails by those reps in the past couple days, nothing shows up.
They've forwarded me the emails they sent, and the Marketo tracking pixels and link tokens are definitely in there.
Yes, we have had similar issues. This is another MSI functionality limitation which has hinder user adoption at our company. If the issue is tied to the plug in then one thing to try is to uninstall the plug in, cancel the lisence, and then re-issue and reinstall.
We've had several issues with the MSI Outlook plug in (none the same as yours) and that seems to be Marketo Support's suggested solution.