Outlook PST files import in In Place Archives issue

Hello,

after import of PST files (> 5 Gb) in In Place Archives, there is a lot of missing folders and emails for me and several of my colleagues.

So we tried import again and again but there are still missing folders and emails.

Drag and drop works but it's a long process.

Did you have the same problem and how did you solve it ?

Thanks in advance for your help,

kind regards,

Eric