To export shared mailbox to PST without downloading entire mailbox, you need to perform a selective export instead of exporting all data. Using the SysInfo Office 365 Export to PST Tool, install and run the software, then log in with valid Microsoft 365 or Exchange credentials. Select the shared mailbox from the preview panel. Choose PST as the saving format. Instead of selecting the whole mailbox, pick only the required folders. You can also enable the Date Filter to export emails within a specific time range and exclude unnecessary items. Finally, choose the destination path and click Convert. This method helps you export only needed data while saving time and storage space.