Hi Dale,
According to your description, do you mean you want to get access to your contacts in iCloud or in Office 365? If you want to get access to your contacts in iCloud, currently, Microsoft has no official articles to support this. You can go to Outlook for mac forum to post your questions there. Thanks for you understanding.
However, if you have the PST file of iCloud and you want to import it to Outlook, you can do the steps below:
1. On the Outlook client, click FILE->Open & Export->Import/Export.
2. Click Import from another program or file, click Next.
3. Select Outlook Data File(.pst), click Next.
4. Click Browse… to locate the PST file and click Next.
5. Click Finish.
Thanks,
Mouran