Exchange Info Store Size

What does the 75 GB limitation in Exchange pertain to, i.e. can both Public and Private database each be 75GB or is it a combination of the two, ie is the Exchange Info Store for the organization limited to 75GB?

Do you add or Priv1.edb and Pub, or is it Priv1.edb + .stm and Pub1.edb + .stm or do you add all four files to determine size.

I am achieving varying answers via Googling.

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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
75GB per you can have a 75 GB Pub and 75GB priv...and yes add both edb and equal the size of the db

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frdbadfAuthor Commented:
Thanks for the reply.  Let me ask you one more thing, in prior versions of Exchange, v5.5, wasn't it a combination of the two?

Note it IS NOT the physical size of the database, it is the logical size.

Logical size = physical size - whitespace (as defined in Application event ID 1221)

Glen KnightCommented:
It is a logical size not a physical size and it is per store.

Have a read of my article here:

if you fond my article useful please vote for it :)
Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
Wow that is going back...I'm really not sure...on the prior versions of 5.5.
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