Depending on whether this is the first time you've started Mail, or the first time you've set up an account, some of these steps may appear in slightly different order. The information you enter on each screen remains the same.

If you need assistance, please first update to the latest version of macOS first.

Mail

1. Start Mail. If the Choose a mail account to add dialog box opens automatically, skip ahead to step 5.
2. From the Mail menu, select Preferences. Note: On the Mail menu you'll also see "Accounts." Don't choose this. It takes you somewhere else entirely.
3. Click Accounts.
4. Click the plus sign at the lower left of the dialog box. The Choose a mail account to add dialog box will open
5. From the list of account types, select Exchange, then click Continue
6. Enter the following:
   • Enter your Full Name (in whatever format you prefer)
   • Enter your Email Address in the form NetID@cornell.edu.
     For example, pqs665@cornell.edu
   • Enter the Password you use with your NetID.
7. Click Continue. Mail will look for the Exchange server.
8. On the Account Summary dialog box, click Continue
9. Unless you have specific reasons not to, we suggest you leave all the boxes checked on the Select the apps to use with dialog box.Click Done.

You should now check the settings in Calendar and Contacts. They are probably correct, but we've seen cases where they needed to be adjusted.

Calendar

1. Launch Calendar.
2. From the Calendar menu, select Preferences.
3. Click Accounts.
4. From the list of accounts on the left, select your NetID account. (It may be the only account listed. That's okay.)
5. Click Server Settings.
6. The entry for Internal Server should be outlook.office365.com
   Correct it if you see anything else here.
7. The entry for External Server should be outlook.office365.com
   Correct it if you see anything else here.
8. Make sure your User Name is in the format netid@cornell.edu
9. If there are any other accounts listed with Exchange showing as the account type, repeat steps 4 - 8 for each Exchange account. Do NOT attempt to make these changes for accounts listed with any other account type.
10. Quit Calendar, then restart it.

Contacts

1. Launch Contacts.
2. From the Contacts menu, select Preferences.
3. Click Accounts.
4. From the list of accounts on the left, select your NetID account. (It may be the only account listed. That's okay.)
5. Click Server Settings.
6. The entry for Internal Server should be outlook.office365.com Correct it if you see anything else here.
7. The entry for External Server should be outlook.office365.com Correct it if you see anything else here.
8. Make sure your User Name is in the format netid@cornell.edu
9. If there are any other accounts listed with Exchange showing as the account type, repeat steps 4 - 8 for each Exchange account. Do NOT attempt to make these changes for accounts listed with any other account type.
10. Quit Contacts, then restart it.