Bom dia...veja se essas opções lhe ajudam
https://www.profissionaisti.com.br/2017/01/removendo-arquivos-antigos-no-windows-server-via-script/
https://social.technet.microsoft.com/Forums/pt-BR/6ec9924f-f0ef-4f1a-afdd-ba0962b1ebe2/script-para-excluso-de-arquivos-com-exceo-de-uma-pasta?forum=scriptadminpt
https://gallery.technet.microsoft.com/scriptcenter/Delete-files-older-than-x-13b29c09
Se útil, por favor Classifique João C.X.Macedo Specialist Platforms Microsoft MCP,MCT,MCSA,MCTS,MCITP, ENTERPRISE VIRTUALIZATION WINDOWS SERVER 2008 R2,MCSE WINDOWS SERVER 2012,MCSA WINDOWS SERVER 2016