Update dormant-user-activity.md (#33252)

Co-authored-by: Laura Coursen <lecoursen@github.com>

data/reusables/enterprise-accounts/dormant-user-activity.md

@@ -21,3 +21,8 @@ A user is considered active if the user has performed any of the following activ
 - Starring a repository
 - Deleting a repository
 - Accessing resources by using a {% data variables.product.pat_generic %} or SSH key
+- Joining an organization
+
+{% ifversion ghes %}
+A user will also be considered active if their account has been updated by LDAP.
+{% endif %}