Sync Copilot for Sales in OUtlook with CRM

I am not being able to use Copilot for Sales. This is the error:

Fix mailbox errors in Dynamics 365

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Your mailbox and Dynamics 365 didn’t sync, so that will need to be fixed before your emails will auto-save again.

Even doing step by step, this is the message - Appointments, contacts, and tasks can't be synchronized because the email address of the mailbox Michele Nakamura requires an approval by an Office 365 Global Administrator. 

Who is the office 365 Global Administrator? I work in Microsoft.