1. Storage considerations
Exchange 2010 standalone
1,000 Mailboxes (2GB each)
DAG
2TB +
2TB +
2TB =
6TB
6TB of
+ Content Indexing (15%)
= 0.9TB
0.9TB
PSTs(2GB per user)
PST Files
2TB
6TB
6TB of +
2TB +
2TB =
+ Content Indexing (15%)
= 0.9TB
0.9TB + + +
= 13.8TB in Exchange

2. Storage considerations
Enterprise Vault
Exchange 2010 and Enterprise Vault
All content > 60 days
1,000 Mailboxes (2GB each)
SIS/Compress=40%
2TB
2TB
1TB
1.6TB
1TB
SIS/Compress=50%
Content Indexing 13% =0.47TB
0.47TB
DAG
0.4TB
0.4TB
0.4TB
2TB +
2TB +
2TB =
1.2TB of
1.2TB
+ Content Indexing (15%)
= 0.18TB
0.18TB
PSTs(2GB per user)
PST Files +
= 1.38TB in Exchange
2TB +
= 2.47TB in Enterprise Vault

3. Summary 1,000 Mailboxes (2GB each) 1,000 PST files(2GB each)
Exchange Standalone
with Enterprise Vault
13.8TB in Exchange
1.38TB in Exchange
2.47TB in EV
Take-away’s
1. 9/10th less in Exchange with Enterprise Vault
2. 2/3rd less combined storage required with Enterprise Vault