UPN change wont update document properties of your files
Whenever the UPN of a user changes (e.g. domain consolidation, acquiring another company or simply due to marriage) the document properties (e.g. author or editor) of all your files on SharePoint or OneDrive wont update automatically.
This leads to issues when user search for their files as they are not found under the new UPN
Also if you use webparts which are based on these properties (e.g. show my last modified files) they wont come up with correct results.
Please vote so that the Product Group consider to fix this situation!