Hi Michael,
If the problem still persist in Outlook, then in this situation you need to repair corrupted Outlook data file that sometimes may harm MS Outlook and may decrease the performance of your MS Outlook. Here the steps, you need to follow to repair PST files that are corrupted.
Find the location of SCANPST.exe and double click on that to open Inbox Repair Tool.
Under Inbox Repair Tool, click on Browse and provide the location of corrupted PST files that you want to repair.
Click on Start to begin the scanning process.
Click on Repair to start repairing the corrupted PST files found after scanning the PST files.
To grab detail info on Inbox Rapair Tool, click on SCANPST.exe to repair PST file
Thanks & Regards,
Henry Davidson