Forum Discussion
Azure information protection custom policies not working
In addition to checking the firewall isn't blocking IP addresses and URLs, check it's not terminating your TLS connection, which breaks certificate pinning. I've added a tip how to check for this client-side, if you don't manage the firewall yourself. See https://docs.microsoft.com/en-us/information-protection/get-started/requirements#firewalls-and-network-infrastructure
Please try the following to completely remove AIP client:
1. Uninstall AzIP client either in control panel or by running AzInfoProtection.exe /uninstall
2. Access Registry (RegEdit.exe) and delete: HKEY_CURRENT_USER\Software\Microsoft\MSIP
3. Clear IE cookies
4. Delete folder: C:\Users\<user name>\AppData\Local\Microsoft\MSIP
5. Clear Windows credentials and sign-out of Office account
6. Restart and run AzInfoProtection.exe again
