Hi @gopith,
Yes, AEM 6.5 and above officially deprecated the Classic UI, and starting with version 6.4, it’s no longer enabled by default - but it’s still possible to enable and use it if needed.
Here’s how:
How to re-enable Classic UI for your users
1. OSGi Configuration (AuthoringUIMode service)
2. User Preferences
3. Session Overrides and URL Access
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Users can switch to Classic UI in their current session via configured navigation links (e.g., a monitor icon) or manually by visiting a Classic UI URL like:
https://<host>:<port>/welcome.html
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Similarly, the Touch UI is accessed via URLs like /sites.html or /editor.html.
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Cookies, user preferences, or OSGi settings determine whether the Classic or Touch UI is presented when opening a page or console.
https://experienceleague.adobe.com/en/docs/experience-manager-65/content/sites/authoring/essentials/select-ui