Hi Guys,
Avoid backup of your Outlook PST files on network like Dropbox, OneDrive etc. As per Microsoft community guideline, you shouldn't store Outlook PST files on Network computer. It can damage the file structure of PST file.
If your PST file is not accessible due to storage on network, then try Inbox repair tool to rebuild the corrupt PST file smoothly. You can also try third party solution like Stellar Repair for Outlook.
References :
https://support.office.com/en-us...
https://it.toolbox.com/blogs/jan...