A colleague's Microsoft Entra ID username contains umlauts, and Windows created the local profile folder using those characters. Several applications cannot handle the resulting path correctly. Is there a supported way to rename the profile folder while preserving the Entra join, registry references, and application settings, or is it safer to recreate the Windows profile or account instead?
4 Answers
Changing the display name or other user information in Microsoft Entra may not rename an existing Windows profile folder. Windows typically creates that folder when the profile is first initialized, and changing it afterward can leave stale paths and inconsistent application settings. Check whether the account name can be corrected before the profile is created; otherwise, rebuilding the local profile is the more dependable option.
I would avoid manually editing the profile directory and registry unless this is an emergency recovery. The undocumented references are the real risk, and problems can appear much later. Recreate the profile, copy the user’s files and required settings, then sign in again with the corrected Entra account information.
Although the folder can be renamed with enough manual changes, it is not a reliable fix. Applications may store the old path in configuration files, databases, binary data, or places outside the registry. The safer approach is to create a new profile with a name that avoids the problematic characters, transfer the user’s data, and remove the old profile after verifying everything works.
A profile migration utility such as ForensiT User Profile Wizard can help map an existing Windows profile to another account or rename the profile relationship. Even with a tool, make a backup first and test carefully, because applications that hard-code the original path may still need repair.

That makes sense, but I was worried that recreating the profile on an Entra-joined device would break the existing account association and settings.