exchange mail box - tool or app that can give detail info on all users mailbox size,folders etc.

Similar question was asked before - read through the lengthy discussion, towards the end you'll find the corrected and solved script.

https://www.experts-exchange.com/questions/23283311/Mailbox-Cleanup-Unread-mail-31-days-old.html

Regards,
Exchange_Geek

Firstly run a command

Get-MailboxStatistics -Identity "UserName" |fl (Just check what is the attributes you need and put that after FL in the last commands)
Get-MailboxFolderStatistics -Identity "UserName" |fl (Just check what is the attributes you need and put that after FL in the last commands)

Get-Mailbox | Get-MailboxFolderStatistics |fl (Attributes you need with "," comma in between)
Get-Mailbox | Get-MailboxStatistics |fl (Attributes you need with "," comma in between)  

- Rancy

Above command wouldn't help in getting data such as unread items.

Regards,
Exchange_Geek

Is there anything else besides a script I can use?

I've requested that this question be deleted for the following reason:

rephrazing  question

Sorry to say but we answered your Query. But wont Object :(

- Rancy