Migration using Insane Mode with Microsoft 365 and On-Premises

Insane Mode for Microsoft 365

Migrating Items into a populated list or library

Migrating items into a list or library may cause an ID conflict when using Insane Mode with Microsoft 365.

Solution

To avoid any ID conflicts, you should empty items from your destination list or library before running the migration.

You can do this by deleting all items in your destination list or library (you can create a backup if necessary by importing the items into a file or folder) 

Here is the list of limitations when migrating using  Insane mode to Microsoft 365:

• File size limit is 15 GB

Incremental update

When using the incremental update with Insane mode on Microsoft 365, all versions of an item at the destination will be replaced by the version from the source if:

• The source item has a more recent "last modified" date than the item at the destination.

This is caused by a limitation in the Azure Import API.

Actions only supported on Normal Mode

The following actions are not supported by the Insane Mode with Microsoft 365:

• Copying ASPX pages from SharePoint 2003 and SharePoint 2007
• Modern site page templates
• Copying Calendar's special occurrences
• Copying list items that are declared as records
• Copying User Alerts on list items 

These actions are only supported by Normal Mode due to technical limitations of the Azure Migration API or ShareGate Desktop Server Extension.

If you prefer using Insane Mode for your migration, you do not have to worry about the above exclusions. ShareGate Desktop will detect these when running a migration on Insane Mode, and seamlessly and automatically switch to Normal Mode. If you have met the requirements for using Insane Mode, it should have minimal impact on your migration as a whole.

Notes:

• Preserving List Item IDs and Orphaned users is not supported in Normal Mode.
• Azure Migration API is not supported in China.

Insane Mode On Premises 

Here is the list of limitations when migrating using Insane mode on Premises: 

• Item IDs won't be preserved
• Copying ASPX pages will use normal mode instead
• Copying Discussion Board will use normal mode instead
• Requires the Server Extension 1.8.3 or higher at the destination.
  • Having the Server Extension installed at the source will also speed up the copy.

These limitations apply to content only. Anything related to item structure will use normal mode.