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Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
We plan to deprecate and remove the support for XML RPC protocol versions earlier than 1.6.9.1 in Plesk Obsidian 18.0.82. We strongly recommend that you update all existing integrations using earlier versions of the XML RPC protocol to comply with the version 1.6.9.1 specification.
A customer asks me to disable the integrated windows authentication in IIS (it's a shared hosting server). Is this something that can be done, or does this bring forth security risks or other issues?
Yes, I think that you can disable it because 'Enable anonymous assess' has more priority than Window authentication. It is used for authentication by Active Directory with Windows or AD internal accounts and I think that disabling will not affect correct Plesk operation.