How to set up a VPN server on Windows Server 2008 R2?

http://technet.microsoft.com/en-us/library/cc725734%28v=ws.10%29.aspx

How to check size limit of an email message size and size limit of an email box storage in Exchange Server?

1. Size limit of an email message.

Organization Configuration | Hub Transport | Global Settings | Transport Settings. Right-click Transport Settings. Select Properties.

2. Size limit of an email box storage.

Organization Configuration | Mailbox | Database Management | Mailbox Database. Right-click Mailbox Database. Select Properties | Limits.