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angeloforum's avatar
angeloforum
Copper Contributor
Jan 11, 2023

Mail flow from OnPrem to Office365

Hello everybody, I have a problem and I would like to ask you who are more experienced. I have an onpremise exchange server Exchange 2019 CU9 connected to Office365, the MX record sends mail direct...
Exchange Server
hybrid
office 365
outlook
angeloforum's avatar
angeloforum
Copper Contributor
Jan 13, 2023
Hi Dan,
my record MX is mydomain-com.mail.protection.outlook.com., i put this record in smart host value?
Dan_Snape's avatar
Dan_Snape
Bronze Contributor
Jan 18, 2023
Yes, that will be the value of the smarthost for the send connector you are using to send outgoing mail (whether it's for a test recipient domain or all domains) via EOP
  • angeloforum's avatar
    angeloforum
    Copper Contributor
    Jan 23, 2023
    Hi Dan,
    sorry for my delay.
    If i have 2 domain (mydomain1 and mydomain2) i need to add in smarthost 2 value? For example mydomain1-com.mail.protection.outlook.com and mydomain2-com.mail.protection.outlook.com

    Thx in advance
    Angelo
    • Dan_Snape's avatar
      Dan_Snape
      Bronze Contributor
      Jan 23, 2023
      You should only need to configure the one smarthost value. This configuration is just so that outgoing mail goes to the correct EOP instance. If you have two custom domains added to your tenant, the values you mention above both point to the same EOP instance anyway. It won't hurt to add both, but it won't provide any extra redundancy