• The institute was renamed from “Institut für Festkörperphysik” to “Institut für Physik kondensierter Materie”.
• The IPKM abbrevation is used in communication with the university, the idea was to use the same abbrevation as the other departements like IAP and IKP.
• The PKM abbrevation is only used in the domain name pkm.tu-darmstadt.de. This was setup before the IPKM abbrev. was aggreed on.

Die TU-ID wird nach dem Ausscheiden deaktiviert. hier zur Information: https://www.hrz.tu-darmstadt.de/support_und_anleitungen/hrz_faq/index.de.jsp#faq_tuid

• Studierende – Nachlaufzeit von drei Monaten nach der Exmatrikulation
• Mitarbeiter/_innen – Vier Wochen nach Vertragsablauf
• Gäste (Gast-TU-ID) – Bis zum im Antrag angegebenen Ablaufdatum

The matrix server auto-populate the account into its own database from LDAP (=mail server account list) when that user signs in for the first time. There is no automatic discovery otherwise, so your users won't see people that are in LDAP but that have never signed in.