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...
Your Exchange Online sent messages should go thorugh your onprem environment before to go "outside"
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.