Whitelist Course Invitations in Exchange Online

This guide describes how to whitelist Nimblr Course Invitations emails in Microsoft Exchange Online.

In most cases there’s no need to whitelist the Nimblr course invitations as they are legit emails using the correct SPF, DKIM and DMARC, but in some cases it might still be a good idea to whitelist them and ensure they are ending up in the prioritized inbox.

Whitelist the sender address

1. Open the Security & Compliance Center at https://security.microsoft.com/antispam. Navigate to Email & collaboration > Policies & rules then click Anti-spam inbound policy (Default).

2. Click Edit allowed and blocked senders and domains. Click Manage sender(s) and then click Add senders and enter the addresses: training@nimblr.net and training@awrns.net. Click Add Senders and Done and then click Save.

Bypass Clutter filtering for course invitations

1. Open the Exchange Admin Center at https://admin.exchange.microsoft.com/. Navigate to Mail flow and select Rules. Click Add a rule (+) and select Create a new rule

2. Name the new rule to, for example “Bypass Clutter filtering for course invitations”.

3. Go to the drop down menu Apply this rule if and select The Sender... and domain is then enter nimblr.net and click Add, enter awrns.net and click Add, then click Save.

4. In the Do the following section select Modify the message properties in the left drop-down and set a message header in the right drop-down.

5. Click the “message header Enter text” and type X-MS-Exchange-Organization-BypassClutter (This field is case sensitive) and click Save.

6. Click the “value Enter text” and type true (This field is case sensitive) and click Save. The action should now look like the picture above.

6. Click Next and then Next again to review the new Mail Flow rule.

7. Confirm that the rule conditions look like in the picture below and click Finish.

Wait for the rule to be saved and click Done.