Hello,
After much troubleshooting, here is what I had to unblock to get the Ubisoft Uplay desktop client to work without any issues:
I had to create a HTTPS decryption exception with the following URLs
local[0-9]*-mtl-[0-9]*\.ubisoft\.qc\.ca/
steamcdn-a\.akamaihd\.net/
lb-upc-dmx\.ubisoft\.com/
wspuplay-ext\.ubi\.com/
msr-api-ubiservices\.ubi\.com/
public-ubiservices\.ubi\.com/
ubistatic[0-9]+-a\.akamaihd\.net/
ubisoft-avatars\.akamaized\.net/
friendsservice\.ubi\.com/
static[0-9]+\.cdn\.ubi\.com/
signupservice\.ubi\.com/
steamcdn-a\.akamaihd\.net/
lb-upc-dmx\.ubisoft\.com/
wspuplay-ext\.ubi\.com/
msr-api-ubiservices\.ubi\.com/
public-ubiservices\.ubi\.com/
ubistatic[0-9]+-a\.akamaihd\.net/
ubisoft-avatars\.akamaized\.net/
friendsservice\.ubi\.com/
static[0-9]+\.cdn\.ubi\.com/
signupservice\.ubi\.com/
ubisoft-uplay-savegames\.s3\.amazonaws\.com/
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