Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello MichaelL369,
Based on my knowledge, the command Get-Contact is to view existing contact objects in your organization and the contact objects include contacts and mail contacts. Besides, you should run the commands using an admin account and the user have granted you permission. Regarding your requirement, I also did a lot of tests and researches at my side. Unfortunately, the resources are limit and I didn't find any relevant official document to get the contacts. As a workaround, you can view the user's contacts, please follow the steps in this article: Open another person's Exchange Contacts.
To get more professional assistance, I strongly recommend you post your requirement in Microsoft Q&A Forum, which is a dedicated forum for customers who want to use Exchange Online PowerShell. In that forum, you will get more qualified pool of respondents, and other partners who read the forums regularly can share their knowledge with you.
Thanks for your understanding.
Best Regards,
Seven