Forum Discussion
Configuring warning messages for Office 365 hybrid emails from external senders
Hi recently migrated o365 and we are hybrid Before our move to hybrid 365, on our on-prem server, I tagged emails internal and external as well sending confidentiality Notices to our recipients Si...
that is already set up.
The problem is that mail flow tag is not working whether i set up on prem or office 365 side or both
I'll suggest to check the message header of a message sent from cloud to on-prem and a message sent from on-prem to cloud. Check If the header “X-MS-Exchange-Organization-AuthAs” says “Internal”. If not, there's some wrong configuration.