Can .pst file be located in Onedrive?

I use several machines - two laptops, a tablet snd smart phone.

There are easier and safer ways of synching data other than locating the pst file in a synchronised folder.

1. The easiest way is to use an Outlook.com email address. then your mail, contacts and calendar are ALL synced automatically as Outlook.com uses Exchange Active Sync. The only thing that isn't synced automatically is Tasks, as there's no built-in app for Tasks. For that I use 2Day, available from the Windows Store.
2. If you use Gmail, then you can also sync mail contacts and calendar on all your devices without resorting to potential corruption of pst files
3. If you use neither, and have no desire to, then you can use IMAP for email, and a third-party contacts, calendar and tasks sync site such as Fruux or Memotoo, both of which offer free accounts. Both of those will sync with Outlook and most other mail clients.

HTH

MS clarified this some time ago, ie they explicitly stated the use of a pst over a network is not supported

https://support.microsoft.com/en-us/kb/297019

MS provides no means of syncing a pst between devices, third party suppliers do offer pst sync tools, generally a paid for option

An exchange connection will sync between devices as will IMAP or outlook.com mail accounts

If you wish to persist with using the pst over a network then ensure you have data backups for when the inevitable occurs

While it is indeed true that network-based pst files are not recommended, some users have reported not having problems in using the local copy that some network-based services - like Dropbox, or like OneDrive- locate in the local machine.  It makes sense, if there is no possibility of concurrent access.  That is, that only one machine accesses the pst file at a time, and never concurrently with another machine.  This is the typical scenario of many of us, when we use -for example- the desktop machine normally, and only use the laptop when on travel.  But never both machines concurrently.

I wished Microsoft clarified this further.  Many, if not most of us use two or more machines, and Microsoft must support Outlook data sharing in more than just one machine.  It is incredible that this late in the game we are still discussing this, because of Microsoft disregard of typical user scenarios like this one.

MS has stated that the use of a pst file over a network is not supported as it will cause data file corruption, at some stage

An ost file is a copy of what is on the server

That's ok, I got my answer from http://www.msoutlook.info/question/697.

I now start Outlook with a batch file:

REM Batch to backup my .OST file to cloud storage.

XCOPY C:\Users\geo\AppData\Local\Microsoft\Outlook******@school.edu.ost C:\Users\geo\OneDrive\

REM Start Outlook.

"C:\Program Files\Microsoft Office 15\root\office15\OUTLOOK.EXE"

fyi,

george