diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe2d7387e0..e0afed1e2e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -142,7 +142,17 @@ The following sections list the changes for unreleased.
    database we're now able to maintain the ocLastSignInTimestamp attribute for the
    users.
 
+   This attribute is return in the 'signinActivity/lastSuccessfulSignInDateTime'
+   properity of the user objects. It is also possible to $filter on this attribute.
+
+   Use e.g. '$filter=signinActivity/lastSuccessfulSignInDateTime le
+   2023-12-31T00:00:00Z' to search for users that have not signed in since
+   2023-12-31. Note: To use this type of filter the underlying LDAP server must
+   support the '<=' filter. Which is currently not the case of the built-in LDAP
+   server (idm).
+
    https://github.com/owncloud/ocis/pull/9942
+   https://github.com/owncloud/ocis/pull/10111
 
 * Enhancement - Add an Activity for FileUpdated: [#10072](https://github.com/owncloud/ocis/pull/10072)