I'm having a very odd issue ever since I've migrated our on-prem exchange to exchange online. It appears that any external meeting request cannot be forwarded to an internal email address. (Using the Outlook 2016 client) There's no error or kick back from the system. They appear to go into limbo. I've checked my mail flow rules and have no explicit rule disabling this function unless there was an internal default to block these forwards.
Any assistance would be appreciated.
Office 365 Pro Plus clients
Spam filter used Proofpoint essentials.