348 votesSharePoint Hybrid and Migration Team responded
Thank you for bringing this suggestion to our attention. While the SharePoint migration investments have been focused on helping the on-prem customer transition to OneDrive and SharePoint in Office 365 using the SharePoint migration tool, we acknowledge that there are additional scenarios like the ones explained in this suggestion that are not covered yet. We are currently considering various options to solve those scenarios, but we cannot commit to anything at this point. Please continue bringing great suggestions to our attention like this one.
An error occurred while saving the commentrs_oakford commented
For migrating files from one tenant to another, use mover.io - would like to see limits changed from 15GB to new 100GB file size if possible though (see https://techcommunity.microsoft.com/t5/microsoft-sharepoint-blog/mover-migration-now-available-worldwide/bc-p/1858638#M5473)
6,037 votesworking on it · AdminSharePoint UserVoice Admin (SharePoint UserVoice Admin, Microsoft SharePoint) responded
We are continuing to validate this long-awaited feature in a Private Preview Program with a subset of customers. Although feedback has been very positive we have identified a few things that we still need to address before we start making this more generally available. We appreciate that this is taking time, however providing a consistent user experience across M365 that continues to function as expected is a complex problem. We will provide another update within the next few months.