Will you be able to migrate large items/attachments?

We do not impose any limit on item/attachment sizes. However, it is possible for large items/attachments to fail to migrate because of external factors. There are two considerations:​

What is the maximum attachment size allowed by the Destination system?
​Most email systems impose size limits. For example, if the Destination system has a 30MB limit, any item/attachment larger than 30MB will fail to migrate.
What is the connection timeout for the Source and Destination system?
​​For security reasons, most email systems close opened connections after a predetermined amount of time. For example, if the Destination system only has 512Kbps of network bandwidth and closes connections after 30 seconds, we may be unable to transfer large items/attachments before the connection is closed.
Notes:

MigrationWiz will automatically make multiple attempts to migrate large items.
Upon completion of a migration, you may resubmit it in error retry mode: (https://bittitan.zendesk.com/hc/en-us/articles/115008101327) to try to migrate failed items. This is always free of charge.
When migrating from or to Office 365, Change message size limits in Office 365 : (https://bittitan.zendesk.com/hc/en-us/articles/115008108047) .
When migrating from or to Exchange (2007 and later) using EWS, Change message size limits in Exchange: (https://bittitan.zendesk.com/hc/en-us/articles/115008253928) .