Ask your IT department to whitelist the following addresses to allow access to reset your password:

BlackbaudOnDemand.com and blackbaudemail.netcommunity1.com
205.139.104.0/22 (205.139.104.1 - 205.139.107.254)
206.79.6.0/24 (206.79.6.1 - 206.79.6.255)
216.235.196.0/22 (216.235.196.1 - 216.235.199.254)
216.235.200.0/21 (216.235.200.1 - 216.235.207.254)