If a user within your organization attempts to login and receives an error that states "Warning: Sorry, your login has been disabled. Please contact your organization's administrator," their user account has been disabled. As an administrator, you are able to enable that user account by managing their Rights.
To enable a user account:
1. Click Management 2. Click Security Groups 3. Click the name of the disabled user, this takes you to that user account's Rights page 4. Mark the box next to Login Enabled 5. Remove any date currently in the Login Enabled Until field 6. Click Save and
If you are the only administrator for your organization and your user has been disabled, or all current administrators are no longer with your organization, please see article How can I get admin access to my database?