One of the partners in the firm that I work at asked me how he could move the location of his offline mail store (OST) from the C drive to the D drive. It wasn’t clear, but it looks like you have to first disable the offline caching mode of Exchange and then restart Outlook. Then shut down Outlook and then reapply the offline caching, but go into the advanced properties to set the location of this new ost file. Once done the file was “moved” (more accurately it was recreated) on his D drive. If anyone is looking for detailed instructions, let me know and I’ll type them up.
Moving the Outlook 2003 OST File
Tuesday, April 24, 2007 • edited Friday, February 7, 2020