Currently have 41 employee mailboxes on Google Apps free edition. Moving to Office 365 next weekend. We're a manufacturing company and my colleagues use the Google Drive for collaboration. They share Excel files, using Google Drive, and several people often work on the same file and make changes at the same time. This is how our production scheduling in currently done (using those Excel files). It is a critical part of our business, at this point. I am having Office 365 migration specialists assist me with the cutover next weekend.
Do you see any loss in collaboration functionality, or other potential concerns that might come up, after we move to Office 365, from Google?