At times you may want to consolidate your work & personal email addresses with LinkedIn (especially if you receive an invite from a contact at your unassociated email address and cannot add them properly).

Log into LinkedIn

1. Go to Profile > Edit Profile
2. under your photo click Edit Contact Info
3. Next to your Email address click the pencil (edit) icon
4. An Add & change email address window will pop up > Add your unassociated email address 
5. You will then get a confirmation email sent to the newly added address.  In the email click the link for confirmation.