Hi @Leonhard KrauthauseAre you using Skype or Skype for Business?
To enable Skype, you will need to whitelist the following URLs:
- login.skype.com
- api.skype.com
- client-s.gateway.messenger.live.com
- ui.skype.com
- s.gateway.messenger.live.com
- static.asm.skype.com
- apps.skype.com
Please note that this list may not be exhaustive, and there may be additional URLs that need to be whitelisted depending on the specific version and configuration of Skype you are using.
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