We have an on-prem Exchange Server, and all computers on the local network use Outlook 2013. Right after we deployed our XG Firewall (SFOS 18.0.4) seemingly at random, users will get a pop-up box in Outlook asking them to sign in. Even if they enter the correct credentials the box will pop up again and again. If they click cancel, Outlook immediately reconnects to the Exchange server anyway, and Outlook works just fine. This could have nothing to do with XG but I can tell you this started happening right after we deployed our XG Firewall. I am wondering if traffic is getting blocked and is causing this unexpected behavior. Nothing else has changed on the network. Has anyone else experienced this and/or do you have any recommendations on how I can troubleshoot this?
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