Proxies cannot see the contacts within your Contacts folder at any time.

Proxies cannot archive items from your mailbox because the archive directory is typically a local directory that a proxy cannot access.

After a proxy user opens a mail message, the message is displayed both to the proxy user and to the mailbox owner as having been opened. If a mailbox owner wants messages that have been opened by a proxy user to be displayed as not having been read, the mailbox owner can ask the proxy user to mark items as Unread after the proxy user has viewed a message. There is no way for a mailbox owner to know if a proxy user has read a message.

Appointments sent by proxies are not automatically accepted. This enables the mailbox owner to review any appointments sent by proxies before choosing whether to accept or decline them.