To export site collection mapping into comma-separated values (CSV) file for analytics or archival purposes open Site Collections and click Export.
Output CSV file will contain mapping data for discovered and matched (migrated) site collection URLs.
Double-check that the account migration is finished (or at least that all SharePoint users are migrated) and create the Migration task:
Caution: If this option is selected, all content of the target site is removed and replaced by source site's content! Use with extreme caution.
The migration task is created. You can track its progress in the Tasks, view the summary on the Dashboard or monitor alerts and notifications in the Events.
Objects and content types migrated and not supported:
|Team owners and team members (creation Office 365 groups)||Only for accounts that are migrated / matched|
|Associated SharePoint document libraries (Files)|
|Team settings||Including team permissions|
|Guest accounts and conversations|
|Wiki sections and pages|
|Applications including Shifts for schedule management|
|Authorship||partially||Authorship in messages is migrated as a string with author name and creation dateA|
|Link preview of public sites|
|Mentions of Teams and channels|
|Images posted inline from buffer|
|Emojy, Teams GIFs, memes|
|Link preview of public images|
|Attached images, media files, documents||
|Files uploaded from mobile application:|
|Rich card attachments:|
NOTE:If you re-run the migration, only new messages are processed. The modified messages are unchanged; deleted messages remain visible.