Outlook 2016 error when emailing out

Hi, I'm testing emailing out and I'm getting the error "The command line argument is not valid. Verify the switch you are using." as an error popup in Outlook 2016.

Version is 2016 MSO 16.0.7571.7063 32bit

Any ideas on how to resolve?

I did see the previous thread "Office 2016 update kills CommitCRM", but this is an Outlook error vs a crash in CommitCRM, so that's why I started a new thread.

Please check out this option and see whether it helps.

Thanks! That resolved it. It was indeed set to Chrome and I updated to the Outlook.exe and left the "%1" after the Outlook string in quotes.