Yes, under ideal conditions, teams of people technically could use Microsoft to edit and review documents online at the same time. I have yet to see it in a real world setting. Often times, where I work, we just get confused by OneDrive's links vs direct sharing vs personal onedrive vs sharepoint onedrive. And we end up sharing multiple copies of the same file on Teams which is another source of confusion.
Sharing multiple copies of the "same" file is where the problems come in.
[2] If you look in Teams, some people have automatic permissions because they are in the Team or already have access to the Teams folder. If they are not in the Team, then you have to give "direct access".
[3] For the paranoid, you first go into OneDrive and "manage access". Then you are faced with two choices whose UX is confusing to say the least. One option is to "Copy Link" which has almost the same identical choices as "Share with Specific People". Note that "Share with Specific People" gives you options like "Anyone/doesn't require sign in" and the dialog has a button called "Copy Link". Huh? I thought I was sharing with specific people. I am still unsure who exactly can see the document. Or if the document was shared externally outside of my company.
SHAREPOINT https://support.microsoft.com/en-us/office/share-sharepoint-...
ONEDRIVE https://support.microsoft.com/en-us/office/share-onedrive-fi...
> All files that you upload, create, or share in Teams can be found in the ONEDRIVE??? icon app on the left side of Teams for desktop.
> Files that you upload to a channel are stored in your team's SHAREPOINT???folder. These files are available in the Files tab at the top of each channel.
https://support.microsoft.com/en-us/office/file-storage-in-m...
I only discovered it by chance while roaming my onedrive directory.
While there might be issues with Office 365's reliability (I don't know, I use Google Docs), the online collaborative capabilities is a fantastic tradeoff. Mailing individual files amongst a group of collaborators impede productivity (even though it has other benefits).
You could make the argument that cloud solutions are not a prerequisite for collaborative tools like Office 365 or Google Docs, but desktop peer-to-peer systems like those that Groove Networks (https://en.wikipedia.org/wiki/Groove_Networks) tried to create did not take off.