I do it with this command:
grommunio-admin exmdb user@domain.tld folder list -r
Note: only folders with number less than 0x20 are identical on all mail boxes. Folders with higher numbers are specific to the mail box.
mail:~ # grommunio-admin exmdb xxx@xxxxxr.com folder list -r
Oberste Ebene des Informationsspeichers (0x9)
├─Gesendete Elemente (0xa)
├─Gelöschte Elemente (0xb)
├─Postausgang (0xc)
├─Posteingang (0xd)
│ ├─Check_MK (0x201173)
│ ├─div. Infos (0x205f93)
│ ├─Nikolaus (0x21e633)
│ ├─_nis2 (0x54877e)
│ ├─Links (0x548782)
├─Entwürfe (0xe)
├─Kalender (0xf)
├─Journal (0x10)
├─Notizen (0x11)
├─Aufgaben (0x12)
├─Kontakte (0x13)