Exchange online connector with existing ADConnet

Hello,

Two years ago, we had One Identity manager 8.1.

We have a sync project to Azure AD tenant.

We had done a project to migrate users from Exchange OnPremise to Exchange Online.

We did not use One Identity manager for that. We used ADConnect.

So the situation is

- we create Azure AD accounts using OIM sync projet

-for some users (filters on ADConnect), we use AD connect to syn EXO attributes to Azure AD and create Exchange online account

Hence we have 2 sync channel for those users and ,some time, errors in OIM (saying the account is mastered by ADConenct..)

We are now upgraded to 9.1 and we want to switch to Exchange online connector and stop relying on ADConnect

Is that possible ?

What are the possible consequence of deconnecting ADConnet?

Any experices with such a situation and solution would be very appreciable