This bounce does not mean that Help Scout rejected the message though we know it sounds like that is what it says - in fact Microsoft 365 did not attempt to deliver it to Help Scout because your Microsoft 365 account is set to not allow automatic external forwarding. Please contact your administrator for further assistance. You will see a specific bounce message in your inbox at Microsoft 365 after attempting to set up forwarding to Help Scout if you need to adjust this setting. The text of the bounce will include this line:ĥ50 5.7.520 Access denied, Your organization does not allow external forwarding. Microsoft 365 accounts default to block automatic email forwarding as part of their outbound spam protection. When setting up forwarding from Microsoft 365 based email to Help Scout, you may need take an additional step to complete the process.
Enable External Forwarding in Microsoft 365