Our in-house team handles deployment and maintenance. By the time somebody opens their laptop, everything has already been set up by the administrator.

The implementation was completed by a reseller.

In the past, we always used some consultants to do initial setup and deployment, and then we became the consultants ourselves more recently. So we used consultants when it was first really getting notoriety and around 2015 or 2016 and it was being used on a mass scale for corporations.  

A technical person from our in-house team set up OneDrive for us.

We had assistance from a partner. We did not install the solution on our own.

From my point of view, there should be cooperation between the company data and network share drives that can can be partially extended (if not completely migrated) to cloud. I understand that some of the data cannot be just moved outside the organization, but in almost 100% of the time, this is not related to all the data.

It is important to decide what data should be migrated to the company SharePoint and which one should be migrated to the company OneDrive for Business. For example, Home folders are another excellent case related to possibility of migration to OneDrive for Business. In the latest versions, the borders between the SharePoint document libraries and OneDrive for business are almost gone. These two entities look almost the same and other changes will come.

We implemented it through a vendor.