# Controlling feature availability

Subscription administrators can request that certain Overleaf features be disabled or enabled for members of their subscription. In order to request a change in availability of any of the features described on this page, please [get in touch](https://www.overleaf.com/contact) with our support team. 

<table><thead><tr><th width="213.47265625">Feature</th><th width="209.15625">Default behaviour</th><th>Notes</th></tr></thead><tbody><tr><td><strong>Overleaf Chat</strong></td><td><strong>enabled</strong> for all groups</td><td>Overleaf Chat is a standard feature that is available to all Overleaf users unless disablement is requested by the group administrator.</td></tr><tr><td><strong>AI Assist</strong></td><td><strong>enabled</strong> at the free level by default for all groups that have not enabled Managed Users<br><br><strong>disabled</strong> for Professional groups with Managed Users</td><td>AI Assist features have both free and premium tiers.  When enabled at the group level,  the free tier is available to all group members. Only members who have subscribed to the AI Assist add-on can use the premium AI Assist features.</td></tr><tr><td><strong>Dropbox Synchronization</strong></td><td><strong>enabled</strong> for all groups</td><td>Dropbox Synchronization is a premium feature that is available on all group plans unless disablement is requested by the group administrator.</td></tr></tbody></table>