how to get access to another persons emails, calendar, contacts

You can right click on the Folder(calendar, Inbox, Sent Items etc). And choose Sharing or Permissions.

It could also be located in the properties menu. However this is how you do it.


You simply select the user and then click ok. Tell the secretary to restart outlook and then it works.

If you want to grant the user (Secretary) full access to user2's (Boss's) mailbox and not require the "Send on behalf" permission but allow the Send-As permissions, and/or if you do not have access to USER2's mailbox and want to do this administratively:

Exchange 2003:
In ADU&C, Ensure you are viewing Advanced Properties (View - Advanced):
- Properties of USER2 account, Security Tab, Add USER to the list and check to allow the "Send As" permission.
- Properties of USER2 account, Exchange Advanced tab, Mailbox Rights, click to Add USER to the list and grant USER the same permissions as "SELF".

Exchange 2010:
In Exchange Management Console, Recipient Configuration, Mailbox, Right-click USER2,
- Manage Full Access Permissions, Add USER to the list
- Manage SendAs permissions, Add USER to the list.

Going to File, Info, Account Settings, Delegate Access from the Boss' Outlook client, you can provision access for the secretary to send emails on behalf of her boss.

rehamris, i did what you wrote, so now, how does she write an email on his behalf and how does she see his calendar and contacts ?

after you allowed to access the mailbox like rehamris suggested, do this:
http://office.microsoft.com/en-us/outlook-help/add-another-person-s-mailbox-to-your-account-HP005242139.aspx
Adds the Mailbox permanently to her Outlook.
Cheers
Indi

thats for 2003, how about 2010

It was 2007 ;-)
In 2010 go to "File", there you have the "Open" dialogue and the account settings as well. 2010 is pretty much the same as 2007 or 2003, only the menues are different.
As I say, 99% you'll find in the Office Help anyway.
Cheers
Indi