This error occurs when MigrationWiz is unable to access the SharePoint collection for a user within Office 365.
The user storage was not initialized, and MigrationWiz asked for it to be provisioned. This operation might take a few minutes, and it has not been completed on time.
The migration process has been canceled but you can run it again in a little while.
If you are using Small Business Licenses, MigrationWiz will be unable to perform the provisioning step, and so the provisioning of the collection must be performed manually.
Note: MigrationWiz cannot provision a OneDrive for blocked users. If a user is blocked, there will be a provisioning or access error.
If the error persists, check the name of the collection within Office 365, by following the steps provided by Microsoft.
Make sure that the username in MigationWiz matches the collection name. The collection name will have characters such as ‘@’ and ‘.’ replaced by an underscore.
The collection may include the name of another domain such as user_name_domain_onmicrosoft_com or user_name_previousdomain_com. Update the username in MigrationWiz to match the account with the correct domain such as firstname.lastname@example.org or email@example.com.
The collection may include a number at the end, such as user_name_domain_com1. This usually occurs when a user was deleted and then recreated later on. MigrationWiz can only access collections that access the username exactly. You will have to re-assign the collection that was assigned to the previous user, and make sure to remove all content prior to the migration.