Exchange server mailbox

By default, no size limitations are set.

The max size of any induvidual mailbox depends on one of 2 configurations (in Exchange 5.5, In Exchange 2000 the configuration can be in many more places). 1. The limit set in the Store properties, if the user properties is set to follow the Store'slimit. 2. The user properties if it is set not to follow the store's settings.
By default the user properties is to follow the store's settings, and the store is set with no Limit.

There is no maximum size for an individual mailbox. You are only limited to the maximum size of the Information Store, which is 16 Gigabytes in Exchange 5.5 Standard, and 16 Terabytes in Enterprise.

This question was closed by the author