Hi @ToniE Actually there is an option to exclude an application form TLS decryption ... ok, it is a creative workaround to achieve that goal but this solution here should work also in your case: https://live.paloaltonetworks.com/t5/Community-Blog/How-to-bypass-SSL-decryption-for-an-application/ba-p/170752 Instead of the application in the article, you have to use ms-lync-base and/or ms-lync-online. There probably the first connection attemt still fails as the firewall will add the IP after this attempt to that dynamic group, but it is a solution that could save you a lot of work and complaints from customers. Regards, Remo Edit: Of course only if the security policies of your company allow such a dynamic TLS decryption exclusion, cause this will add the risk of not decrypting misidentified connections. And thepotential risk that this configuration could be exploited to send data out of your network without decryption
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