Office 365 - Apple Mail Exchange Reconfigure (Mac OS X 10.9-10.10)

Last Updated: 08/16/2017
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This tutorial is operating system independent.


The following instructions step through the process of reconfiguring Apple Mail on Mac OS X 10.9 and 10.10 after being migrated from Exchange 2007 to Office 365's Exchange Online service. This process involves deleting and setting up the account again with the correct settings.

When trying to send or receive a message after being migrated, an error message will appear. Click Try Later, if this message appears.

Step 1

From the Mail menu, select Preferences.

Step 2

Select the account and click on the - button, in the lower left of the window.

Step 3

An alert will appear mentioning that the account is shared over other apps. Click the Internet Accounts button.

Step 4

Select the account and click on the - button, in the lower left of the window.

Step 5

Click OK to confirm the account deletion.

Step 6

Click on the Exchange button.

Step 7

In the Name field, enter a name for your account.

Step 8

  1. For the Email address field, enter your address and in the password field, enter your IdentiKey password .
  2. Select Continue.


Step 9

Apple Mail will produce an error. Select Continue on the error.

Step 10

On the next screen you will be prompted to manually enter settings.

  1. in the User Name field, enter your your
  2. In the Server Address field, enter
  3. Select Continue

Step 11

Select Continue on the Account Summary.

Step 12

Choose the apps you wish to connect, then click Done.

Step 13

Your account will now be configured.