For Windows DNS Manager (Active Directory) here are step by step instructions with the corresponding dialog boxes. First browse to the root of your college’s FQDN lookup zone, then right click and select “Other New Records” and under resource type select "Text (TXT)" and finally "Create Record"; 
Create and save the two required validation records indicated in your text file;
Next, create the three required CNAMES required for DKIM signing indicated in your text file;
Create or append your SPF record (if it does not already exist) with the following string; "include:mentormail.opencccapply.org" before the ending "~all" statement
