Is it possible to access two Marketo accounts with the same email address?

[Erik_Heldebro2]

Aside from setting up SSO, you can also just achieve this with a "+something" in after your name and before the @ symbol.

So if you have login to instance 1 set up as first.last@company.com you can add another login to instance 2 as first.last+two@company.com (of course you can put + anything you want there) and it normally works fine getting emails to the same account with login details, afaik using G Suite but unsure about other clients like Outlook, worth a test!