
You can upload them to a non-synced folder for backup purpose, but make sure to copy to a local and non-synced folder before you open those in Outlook. And it will create infinite versions of itself in the cloud. If you try to sync it, it will never finish, as the file will be locked by Outlook. These files are kept permanently opened while you have Outlook opened, and usually they are huge files, containing gigabyes of email, stored in a non-structured text database. By active, I mean files you have opened in Outlook, so that you can still search data on them. Never, by any chance, move your active PST files to a OneDrive folder that is being synchronized to the cloud. But if you still rely on PST files to archive your old emails, this is for you. If you are lucky enough to be in a company that has been able to get rid of PST files, lucky you, you can skip this. PST (Personal Storage Table) files are the IT nightmare.

I hope you enjoy it!ĭON'T sync PST files to OneDrive. But there's always some things that will always raise questions, should I do this or not? Here's a little guide on DO's and DON'Ts I put together from my daily experiences as a IT guy supporting OneDrive for a few thousands of happy users. OneDrive is pretty easy to use, Microsoft has done a great job on making a real user friendly product. As for now, everyone that uses Microsoft software must be using or at least know about OneDrive.
