Today I went to create a new Mailbox Database as I wanted to get rid of the white space in the current one. So I thought I would open the EMC (Exchange Management Console) and quickly create it. Upon giving the new database a name and setting the DB and Log location it failed immediately when creating the database.
So I opened up the EMS (Exchange Management Shell) and ran the following command:
new-mailboxdatabase -name ‘DB Name’ -server ‘Server Name’ -edbfilepath ‘Path File.edb’ -logFolderPath ‘Path FileName_Logs’
This ran without any issues, then you need to mount the Database:
mount-database -identity ‘DB Name’
Now if you open the EMC you will now see the new DB.
Hope it helps.