SAGE 50 Accounts integration with Microsoft 365

We have run into a problem with integration. 

We have updated Sage to V27 with the hope to be able to use Microsoft integration and new features.

But Sage require full access to the MS Admin account, which is not possible for security reasons as all data is stored on a shared drive, and customer support is not able to help us to find a solution to this. Is it possible to allocate what areas sage has access to and what actions?

Our system is run on Windows server 2016 with a Microsoft subscription.

Thank you for advice in advance,