Exchange-to-O365 Migration Permissions

Currently trying to perform a migration from Exchange to O365. Making sure that there's not a permissions issue going on as a few oddities have been noticed.

On the EAC Online Home page, the Exchange box showing "Last 5 migrations" says "Looks like you do not have permission". When I go through the O365 Admin center to Setup > Migrations > E-mail (labeled as "Gmail, Yahoo, and other webmail accounts") > Get Started > "Go to Exchange Admin Center to migrate email", I end up at a blank page.

The permissions on the admin account I have are as follows:

On-Prem AD: Organization Management O365: Global Administrators

Additional info: MSP, this appears to have been setup before and used for EOP for their current Exchange setup, some users have been using it for Office licensing, but no actual mailboxes have been migrated over or created on it. The only licenses applied are "Microsoft 365 Apps for business" licenses and the EOP license. We are not operating under another vendor, we are working directly with Microsoft.