The documentation for WOW II informs you that if you are the unit commander, vice commander, or HR officer, you may opt in to showing your email address or phone number, or both, on the "About this Unit" page.  The opt-in/opt-out procedure calls for the respective member to log into AuxOfficer, and then navigate to his/her own page.  Halfway down, below the phone numbers, are four EDIT buttons that allow the member to edit their own settings.

Here's the secret handshake: Regardless of what the settings say in AuxOfficer, if you have never changed these settings before, they are not stored in the AuxOfficer database (where WOW finds them) until you change one of the settings for the first time, and hit SAVE. Then, and only then, is the information written to the database for WOW.  In particular, if you wish to opt IN, come to your AuxOfficer page for the first time, and the setting are already what  you want, you still must change something, hit SAVE, and then if necessary, change it back and hit SAVE again. Then, your choices will be reflected in WOW.

NB: WOW II "caches" all of the unit's information when you open the site for the first time, so as not to keep going back to the database over the internet.  In order to see the results of a settings change like this, it is necessary to close your browser AND ALL OTHER WINDOWS OPEN from the SAME browser, and then re-visit the site.  This causes the system to read the parameters again from the database.