We have some user on-premier and has create send connector to EOP office365 as Replay email to send outside .So if Email from on-premise send to outside then rule email of exchange online has approve for user onpremise ?
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I just test as below
- on on-premise : i create a connector send to gmail by relay office365 , is when email from on-premise when send email to gmail will as flow (local server -> edge -> office365 -> gmail)
- and i continue create a rule with sender is email on-premise then see these email on-premise if mask sender in rule then rule will apply
--> So rule on office365 can apply for both local and office365 ?