Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi Mark,
I’m here to help.
Based on my knowledge, distribution lists won’t show in Outlook Groups under the Inbox, where only Microsoft 365 Groups are shown. If you would like to open your distribution list, you could go to Outlook Contacts and add this distribution list to your contact by navigating it in Address Book on the top right. Please find below screenshot for your reference. You could also Create a contact group or distribution list in Outlook for PC.
If you would like to manage a list of emails received by this group, besides filtering in Inbox, you could also create an inbox rule. For more information, please refer to Manage email messages by using rules.
Hope this helps. Please feel free to let us know if you have any questions about this.
Best regards,
Jasmine