" that with hybrid you will never move away from this scenario. This is regardless what it says in the support article under Direct Send about it being for internal mailboxes only (see the other scenarios text where it talks about using Direct Send for mailing lists - which are external by their nature).Īs for #3, you realise when you say "We will eventually move away from this and our internal mail server which is why we are not deploying new services that point to our internal mail server. This is why I did not suggest you try Option #1 and only either #2 or #3.įor either of these, it does not matter if the recipient is internal or external. Therefore for #1 you would need to login with the actual From address and not another account, but then MFA would impact you. The error "Diagnostic-Code: smtp 550 5.7.60 SMTP Client does not have permissions to send as this sender" means that the account you are logging in with does not have permission to send as the From address you are specifying. Microsoft 365 will ask for your mobile number, then send you an SMS message containing a 6-digit code to verify your device.When I said that MFA has nothing to do with this, I mean this specific error. If you would rather use SMS messages sent to your phone instead, select I want to set up a different method. If you don't have it installed there is a link provided to download it. If you have it installed on your mobile device, select Next and follow the prompts to add this account. The default authentication method is to use the free Microsoft Authenticator app. After you choose Sign in, you'll be prompted for more information. Sign in to Microsoft 365 with your work or school account with your password like you normally do. For example, you first enter your password and, when prompted, you also type a dynamically generated verification code provided by an authenticator app or sent to your phone.
Tip: Want to know more about multi-factor authentication? See What is: Multifactor authentication.īy setting up MFA, you add an extra layer of security to your Microsoft 365 account sign-in.
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