Setting advanced property problem

I’m having problems setting the advanced properties on my mail databases.

Whilst in the admin client and using the database tools on the files tab, advanced properties. I want to set ‘replicate unread marks-clustered servers only’

however it will not apply these changes to the databases. The only way I’ve managed to add this setting is to go into the advanced props individually. This is unacceptable with over 400 mail files.

Any ideas

Thanks

T