A list view is a feature that allows users to filter and display records based on certain criteria and fields. A Kanban view is a feature that allows users to view records as cards organized by columns that represent stages in a process such as opportunity stages or case statuses. Users can switch between list view and Kanban view by clicking on a toggle button on any object tab that supports Kanban view such as opportunities or cases. Users can also edit records by dragging and dropping cards from one column to another or by clicking on an inline edit icon on each card. In this case, the administrator can create a list view on the opportunity object that filters opportunities by expected close date in the next 90 days; and recommend users switch the view to Kanban to edit opportunities by drag and drop. Reference: https://help.salesforce.com/s/articleView?id=sf.lex_list_views.htm&type=5 https://help.salesforce.com/s/articleView?id=sf.kanban_view.htm&type=5

Component visibility allows you to restrict the visibility of a related list based on a permission set.

Campaign influence is a feature that allows users to track how campaigns have influenced opportunities and measure the return on investment (ROI) of marketing efforts. Users can see which campaigns have influenced an opportunity on the related list and assign different attribution models to calculate the campaign influence. Reference: https://help.salesforce.com/s/articleView?id=sf.campaigns_influence.htm&type=5

Validation rules allow you to prevent users from changing an opportunity close date to a date in the past.

Log in as the user is a feature that can be used to validate the error the user is receiving. Log in as the user allows an administrator to access Salesforce as another user and perform actions on their behalf, such as editing an opportunity. This can help troubleshoot issues that are specific to a user's profile, role, or permissions. Reference: https://help.salesforce.com/s/articleView?id=sf.admin_login.htm&type=5