Hi Guido,
Word’s citation styles depend on both the bibliography XML files and the Word configuration. Here are the most common reasons:
Profile or device-specific issue Since you mentioned another device with the same subscription shows all styles, this suggests a local configuration problem rather than an account limitation.
Corrupted or missing registry entries Even if the XML files are in Roaming\Bibliography\Style, Word needs registry keys to display them in the dropdown.
Feature availability differs by build Some click-to-run builds or updates load only default styles (APA, MLA) if the registry or configuration isn’t pointing to the full set.
Office repair didn’t reset user profile Online repair fixes binaries but doesn’t always refresh user-specific settings.
What you can do now
Check Word version and update
Go to File → Account → About Word and confirm you’re on the latest build.
Reset Word settings
Close Word.
Rename the folder:
%appdata%\Microsoft\Bibliography
Word will recreate it on restart.
Re-register the bibliography styles
Open Registry Editor and check:
HKEY_CURRENT_USER\Software\Microsoft\Office<version>\Common\Bibliography\Style
If missing, Word defaults to APA/MLA only.
Repair Office and clear cache
Perform Quick Repair, then Online Repair again.
Sign out and back into Office to refresh profile sync.
Workaround if urgent
If you need IEEE or ISO immediately, you can manually edit the XML in the Style folder or use a citation manager like Zotero or EndNote until Word loads all styles.
I know this feels like a hidden setting issue, but it’s usually tied to registry or profile corruption. Resetting the Bibliography folder and checking registry entries often restores the full list. Let me know how it goes, Help!