Adapted from http://www.softwarepro.org/blog/delete-and-recreate-ost-file-outlook-2016-2013-2010-2007/
Deleting .ost file is quite easy if you know the location. Simply locate the Outlook folder and select .ost file and delete. But you do not know the location of OST file then follow the steps mentioned below. Remember one thing that location of .ost file different in different versions of Outlook.
Quit Outlook (If it is Running).I used this process to get my Outlook to actually update the cache. I had disabled the cache through
Go to Run window or press windows key + r.
Type “%LOCALAPPDATA%\Microsoft\Outlook\” in the Run window and click OK.
Note: – The command will automatically locate .ost file from any Outlook 2016/2013/2010/2007/2003/2000.
Select the .ost file and either right-click on it and then hit on Delete option or press Delete Key.
File\Account Settings\
Double Click the Profile Email
After I did so, I could see my email and the shared email account, but it was not nearly as responsive.
After I deleted the .ost file, Outlook took some time to re-load the cache (about 10 minutes). But it was faster after that.
