With the great move to virtualization we would like to have nfs/smb support to store the database files, meaning that we can haves support to present VMDKs hosted on NFS/SMB to the OS and host databases on them, this will be great for small and large enterprises due to the simplicity of nas based deployments...
The ability to save signatures centrally (in the users mailbox) and not in the local profile. Saves a configuration step for users/admins and makes it possible for the user to use the exact same signatures in OWA, EAS, etc. etc..
DIR 2.0 has added more functionality especially when combined with single item retention except for the ability to restore users deleted folders. If a user deletes a folder with items in it, we can only restore the items and not the folders WITH the items in it. In 2013, New public folders have the ability but not normal mailboxes.
Just like the EMC (Exchange Management Console) in Exchange 2010. That had the ability to preview the Exchange Management Shell syntax or in other cases to review the used syntax after it was applied.
This ability is a great learning tool but also a valuable tool for documentation.
Adding Set-MailboxSentItemsConfiguration / Get-MailboxSentItemsConfiguration for Exchange 2013, which is more elegant and manageable than setting (version-dependent) Outlook registry keys.
When a user leaves the organization and their mailbox and AD account are removed the delegate information get's stuck in the Outlook client and creates errors for the users until it is removed. Is there anyway to make this a function of AD or Exchange so that this removed when a user leaves?
This was available with Lync 2010/OWA integration, but Lync 2013 integration requires manually editing the web.config in Exchange.
Add the Rollup & Cumulative update version to the Server Version name. Currently when you run Get-ExchangeServer | FT Name, AdminDisplayVersion it just shows the build number which we have to lookup or remember every build number. This would remove the need for extensive scripts that look at registry keys among other things.
An app like the OWA App for iPhone/iPad, but now for Android devices. No need for ActiveSync and all it's troubles that come with it (for instance: SD encryption sometimes formats the SD with loss of data) and no worries about a complete remote wipe (potentially wiping personal data).
Allow a user to change their FROM address to any of the SMTP addresses on their mailbox or one they have Send As rights to.