This article explains what is the zTruncatedFolder.
Cloudiway synchronizes folders between source and target mailboxes before migrating mails. This step may fail for different reasons.
There is a big difference between the behavior of Google Drive and OneDrive. This article explains the main issue when migrating from Google Drive to OneDrive and provides Cloudiway’s solution.
This article explains how Google labels are converted to folders during a migration.