1. On the Tools menu, click Accounts.
  2. Look at the Exchange account in the left pane. If there is a problem with the connection, the indicator icon will be orange.

Set Proxy For Apt-get

If you've successfully connected to the account before, try to connect to it from another Exchange application, such as Outlook on the web. You can also check the status of the Exchange server by contacting your Exchange server administrator.

Possible cause: Your Exchange account requires you to log on by using an encrypted channel.

Proxy Server For Mac

Solution: Contact your Exchange server administrator to learn if your account requires an encrypted channel, and if this is the case, verify the setting for this channel.

  1. On the Tools menu, click Accounts.
  2. In the left pane of the Accounts dialog box, select the account.
  3. Click Advanced, and then click the Server tab.
  4. Under Microsoft Exchange and Directory service, select the Use SSL to connect check boxes.

Possible cause: Your computer requires a mail proxy server to connect to the Exchange server.

Solution: Contact your Microsoft Exchange account administrator.

Set Proxy For All Users

Ask your Exchange account administrator which proxy server you should use to connect to the Exchange server. For information about how to configure a connection to a proxy server, see Mac OS Help.