I may be reading your email incorrectly, but:
The DP for Exchange should 'mount' the TDP database first and then you should 
be able to restore one or more mailboxes,  one email from one mailbox or the 
whole DB.
You need to make sure that whatever drive on your TDP server that you are 
mounting/restoring the TDP DB to, is atleast the same size as the original TDP 
DB.
 
YouTube video:
Here are some that IBM presents - 
http://www.youtube.com/watch?v=tXl95HhyFi0&list=PL1c3vkFzmhec0xvPtplZD_yNpaPNfRHh0
 



-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
McWilliams, Eric
Sent: Tuesday, June 23, 2015 1:14 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Finding backup tapes

I'm sorry.  I should have been more specific.  My Exchange admin is trying to 
restore a mailbox using the DP for Exchange GUI.  It doesn't give him any 
option to do a preview before starting the restore.


Eric 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
George Huebschman
Sent: Tuesday, June 23, 2015 11:19 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Finding backup tapes

What kind of restore are you working on?
Are you restoring a volume from a primary tape pool, node, or a  (at the 
server); or a file (group of files) on a client?

There is a "preview=yes" option for restoring a volume, but I don't see that 
for restoring files from the client:

Syntax

            .- --FILE-.
>>-REStore--+---------+--+------------+------------------------->
                         '- --options-'

>--+- --sourcefilespec----------------------+------------------->
   '- --{--filespacename--}--sourcefilespec-'

>--+------------------------+----------------------------------->
   '- --destinationfilespec-'

>--+-----------------------------------+------------------------>
   '-BACKUPSETName=--+-backupsetname-+-'
                     +-localfilename-+
                     '-tapedevice----'

>--+-----------------------+-----------------------------------><
   '-LOCation=--+-server-+-'
                +-file---+
                '-tape---'

George Huebschman (George H.)



The contents of this email are the property of PNC. If it was not addressed to 
you, you have no legal right to read it. If you think you received it in error, 
please notify the sender. Do not forward or copy without permission of the 
sender. This message may be considered a commercial electronic message under 
Canadian law or this message may contain an advertisement of a product or 
service and thus may constitute a commercial electronic mail message under US 
law. You may unsubscribe at any time from receiving commercial electronic 
messages from PNC at 
https://urldefense.proofpoint.com/v2/url?u=http-3A__pages.e.pnc.com_globalunsub_&d=AwIBAg&c=MaiD1Z8YVCD63kI1LCyPtWg0Yfm6VFptlj7wuHNxy-0&r=ohMdG7xLBNfJLpBxDYE1hxG5DHMxVAlyhTmATkid320&m=ZGKXYMqw8eniFTif9SOuq-QW673I2ZJUmuv4un7Efzc&s=Y3rQGTIpvpQo_LomL5gpIYZomS39QbbGuaACtfjSM0Y&e=
PNC, 249 Fifth Avenue, Pittsburgh, PA 15222; pnc.com

**********************************************************************
*** CONFIDENTIALITY NOTICE *** 

 This message and any included attachments are from MedSynergies, Inc. and are 
intended only for the addressee. The contents of this message contain 
confidential information belonging to the sender that is legally protected. 
Unauthorized forwarding, printing, copying, distribution, or use of such 
information is strictly prohibited and may be unlawful. If you are not the 
addressee, please promptly delete this message and notify the sender of the 
delivery error by e-mail or contact MedSynergies, Inc. at postmaster AT 
medsynergies DOT com.