A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hello,
you can use data validation in a shared workbook, you just cannot set it up or change it while the workbook is shared. In order to set it up or change it, you have to unshare the workbook, apply the data validation, and then share the workbook again.
In general, shared workbooks are not a very good idea because they are unreliable and will become corrupt eventually. If you use shared workbooks, make sure that you have a very rigorous backup scheme, because the workbook can start acting funny and lose data any time. Shared workbooks are only good for tracking changes, but not for many people maintaining a single data source simultaneously. If you need multi-user edit access to a data set, please consider a database like Access or SQL.
cheers. teylyn