![]() ![]() As a result, it is highly recommended to configure LDAPS on these identity sources. Any solution connecting to vCenter using AD accounts (usually service accounts) will be negatively affected once the change is rolled out by Microsoft. If you have an identity source configured for unencrypted LDAP you face failed logins whenever using a user on that domain. Impact of the Microsoft Update : Login failure. If your identity source is already configured with LDAPS you don’t need to change anything. Impact of the Microsoft Update : None according to VMware. ![]() This mode can be configured for TLS encrypted communications with the Domain Controllers (LDAPS) or unencrypted communications (LDAP). It is also useful if you need to connect another domain than the one vCenter server is a member of. This option is available for backward compatibility and requires that you specify the domain controller and other information. One odd thing about it is that it still generates 2889 events even though it works with the LDAP hardening settings enabled. IWA uses different protocols and mechanisms to interact with Active Directory and is not affected by changes to the Active Directory LDAP servers. Integrated Windows Authentication (IWA) has also been tested by VMware Engineering and verified to be compatible with these changes. VMware released a blog on the in which they state the identity sources configured with Integrated Windows Authentication (IWA) will not be impacted by the Microsoft update. The machine on which the vCenter Single Sign-On service is running must be in an Active Directory domain to use this option. Active Directory (Integrated Windows Authentication) We are obviously only dealing with AD here and the two (and a half) different ways to implement it as an identity source. ![]() The single-sign-on (SSO) component of vCenter leverages identity sources to allow users to connect using their AD or OpenLDAP credentials. You may find some software other than VMware pop up in this list which you can proactively remedy as well. It will show you the IP of the server making the request and which domain account was used. I displayed it in Powershell to show all of its information. Whenever a client makes an unprotected request, a 2889 event such as this one will appear. Once this key has been edited, the event viewer will start logging diagnostic events under the “ Directory Service” log.
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