We have company's website successfully connected to Google Analytics account, which we can access with one email address. We have only reading rights and can't see the main admin or add other users to the Analytics account. How do we take control of our own analytics without loosing the historical data?
It's possible to regain access to your admin account, but you would need to do a few things to show that you are the account owners. The steps here will try to help you do that: https://www.en.advertisercommunity.com/t5/AdWords-Tracking-and-Reporting/How-to-gain-access-to-your-Analytics-account-Property/td-p/436348