Configuring Microsoft365 with ExchangeDefender
Step 1: Configuration
Your organization should have a SPF record for the domain(s) registered with Office 365. When implementing ExchangeDefender with Office 365, this record must be updated in the DNS zone for the relevant domain to include the following:
Remove: v=spf1 include: SPF.PROTECTION.OUTLOOK.COM –all
Replace with: v=spf1 include: EXCHANGEDEFENDER.COM -all
CONFIGURING OUTBOUND SMARTHOST CONNECTOR:
Step 2: Mail Flow
LOG IN to the Office 365 Administration Console.
Select the Admin | Exchange menu item. The Exchange Admin Center is displayed. Once displayed, in the menu on the left-hand side, CLICK 'mail flow' as shown.
Step 4: New Connector
ENTER the name of the connector (Can be a name of your choosing, we chose Exchange Defender for the purposes of this guide).
CLICK check box for “Turn it On”. Click NEXT -
Select the option for 'Only when email messages are sent to these domains' and click the '+' button to add the domains
Step 7: Add a Smart Host
Add a smart host. Add 'outbound.exchangedefender.com' as you see it below.
Once you've entered the smart host hit the 'Save' button. From there you'll be taken to the TLS screen. Keep all options default as shown in the screenshot below. Click NEXT. Add a smart host. Add 'outbound.exchangedefender.com' as you see it below.
Microsoft365 and ExchangeDefender Connection Filtering
Microsoft365 (Office365) can at times, typically during high load or attack on the tenant, randomly block partner organizations from connecting to deliver email. In order to work around this issue, you need to follow the following steps.