It seems like you're encountering a specific behavior of Excel where copying cells with data validation to other cells does not carry over the data validation rules when the worksheet is protected, even if the cells themselves are not locked. This can be somewhat limiting because it prevents the data validation from being applied to new cells via copying, which is a common task in Excel.
Unfortunately, there's no direct setting in Excel that allows data validation to be copied down to new cells while the worksheet is protected. Data validation rules are generally maintained when copying cells in an unprotected sheet, but protection constraints can interfere with this behavior.
Here are a few approaches you might consider to work around this issue:
- Use a Macro to Copy Data Validation: If you're comfortable with VBA, you can write a macro that temporarily unprotects the sheet, copies the data validation, and then re-protects the sheet. This approach requires careful consideration of security and protection settings. Ensure macros are allowed to run by the users.
- Pre-apply Data Validation to a Larger Range: Before protecting the sheet, apply the data validation to all the cells in the column or range where you expect data to be entered or copied. This way, even if the sheet is protected, the cells will already have the necessary validation applied.
- Adjust Protection Settings: When you protect the worksheet, ensure that you check the option that allows users to edit objects or scenarios, depending on what Excel version you're using. Sometimes, tweaking these settings can allow for more flexibility while still keeping the sheet protected.
- Manual Application of Data Validation for Users: Educate users on how to apply data validation themselves if they add new rows or cells that need it. This is more of a workaround than a solution and might not be feasible depending on the users' Excel proficiency.
- Unprotect and Reprotect Through User Actions: Consider creating a simple interface (such as a button with a macro) that users can click to unprotect the sheet, perform their copying or data entry, and then reprotect the sheet. This would automate the steps and reduce the risk of leaving the sheet unprotected accidentally.