Microsoft Copilot for Microsoft 365 working with external account.

Hi All,

In my small business, I'm a self-employed sole employee who works as a subcontractor. I've just added a licence for the Microsoft Copilot for Microsoft 365 to accompany my existing Microsoft 365 Business Premium licence.

I work a lot of my time for one specific contractor, and they provide me with a Microsoft 365 Business Basic account. This is a different tenant to my business. This account primarily uses email and file storage (Onedrive/SharePoint). I access this account using my own devices and software (Including the productivity apps).

I've noticed that the Microsoft Copilot for Microsoft 365 only works on my business account, not the contractor's account, where I perform most of my work. This can be seen easily when using the new Outlook, as it's only available on my business mailbox, and if I click on the contractor's mailbox, the Copilot disappears.

As such, Microsoft Copilot for Microsoft 365 is of little use currently. Is there any way that my accounts could be restructured (perhaps the use of guest access or something?) so that this licence I've purchased could be used on the contractor's account instead of my business account?

Thanks for reading and in advance for any assistance/response you can provide.

Cheers

Matt