OK; I'll open with this is a hack, but worked well in the past.
Using Outlook and and an IMAP account, in the past was able to keep the .pst in a Dropbox account and with care in closing when not in use, we could open on a laptop and gain access to the account and then later same on workstation. Was a simple matter of keeping the .pst file synched and all was well; never an issue.
Now years later trying to do the same with Outlook 2013, but its creating an .ost file for the IMAP account and not a .pst. , with the added grief of absolute not being able to move the .ost when its created. So created a symlink on the workstation and that went well, the "real" .ost is now in the synched folder.
But, the laptop is being obstinate and will not connect to the .ost, claiming that it "...has been configured for use with a different mailbox."
Would be great if I could get this same old solution working again. Worked so well in the past; question is how to overcome the complaint and get the laptop to use the synched .ost file?