You can run Scanpst.exe hope it will correct your issue. Or may be it is inactive….. see here for more hints….https://itknowledgeexchange.techtarget.com/itanswers/import-and-export-inactive-in-microsoft-outlook-2007-2/
*You can click on Tools, Customize
*when that window open Choose Category File (you will see or scroll until you see “Import and Export”)
*Click and drag Import and Export to list under File on the menu bar.