There's a difference between Exchange and IMAP mail server folders and Gmail labels.

For details, go to Group emails into conversations. To display the total number of messages in All Mail, turn off Conversation view in the Gmail source account.

If so, Gmail groups messages into a thread and the number of total messages is lowered. Conversation view is turned on in the source account.If you see more items in the source mailbox or the Total items discovered count than are migrated, it might be because: If the migration is proceeding, the Items successfully migrated or Items that failed to migrate numbers increase. Tip: You can check the metrics of a migration by pointing to the status bar. For troubleshooting purposes, monitor the migration status and note how many messages fail to migrate. If you point to the status bar and you see a 'Mailbox estimation failed' message and the percentage is stuck at 0%, the migration hasn’t stalled, but the status bar isn’t updating. The status bar reports 99% until the migration completes. The number of items successfully migrated exceeds the total items discovered.When the labels are applied, the migration completes and the status changes to 100%. The progress indicated by the status bar doesn't change during this task. The data migration service is processing email messages that already exist in the target mailbox (for example, a message that exists in more than one folder in the source account) and is applying labels.This situation can occur for the following reasons: In some cases, the status bar doesn’t progress as expected and stalls on a percentage (usually 0% or 99%).

Fail to import data artcam