I cannot log into MyTelus with a non-local IP address

That's good info that you think it's strange. The following is how I can reproduce it:

1. I use the link to get to mytelus on my firefox browser.  My VPN is on. 

2. Cloudflare does its thing to make sure I am not a bot

3. Login page displays

4. I enter my credentials

5. Message is: Our login system is currently down for maintenance. Please try again shortly.

(I have a screenshot but I do have the permission to upload images)  link of page is:

https://www.telus.com/telus-login-v2?service_type=mytelus&acr=ci-loa3-mytelus&goto=https%3A%2F%2Fauth-gateway.telus.com%2Fas%2Fauthorization.oauth2%3Fclient_id%3DPingFedClient%26response_type%3Dcode%26scope%3Dopenid%26service_type%3Dmytelus%26redirect_uri%3Dhttps%3A%2F%2Ftelusidentity.telus.com%2Fresume%2F%26acr_values%3Dci-loa3-mytelus%26state%3Dhttps%3A%2F%2Ftelusidentity.telus.com%2Fas%2FxHgSR%2Fresume%2Fas%2Fauthorization.ping%26acr%3Dci-loa3-mytelus%26acr_sig%3DaZSMdLZWS9ngGjlbVd-D-ofw5dhBk8aBkI9excqqp4E

6. Turn off VPN

7. Reload original login page

8. I enter my credentials

9. Displays the 2ndFA page as expected (after which I am into my telus account)