In fact, this information is easily available on technet, but sometimes it is useful to organize and put them in one place.
Exchange 2010 and Exchange 2007 recipients limit
There is an important change compared to Exchange 2003 – Distribution group are treated as one recipient.
We can restrict recipients limit at the following levels:
- Organization
- Transport server
- Receive Connector
- Mailbox
So…
Recipient limit at the organization level, we can check this PowerShell command:
Get-TransportConfig | fl MaxRecipientEnvelopeLimit
or in EMC
Organization Configuration | Hub Transport | Global Settings | Transport Settings tab | Transport Settings Properties
English 
polski