activedirectory autofs direct maps

[mpicjohn]

Hello everybody,

I'm trying to migrate automounter maps to AD (samba4). Common stuff works as desired, but the equivalent to a direct map where the mountpoint is not at the root of the filesystem does not work.
The classic approach would look like this:

auto.master:
/- /etc/auto.direct

auto.direct:
/groups/group1 -fstype=nfs,nfsvers=4,lock,proto=tcp,rsize=32768,wsize=32768 server1:/share1
/groups/group2 -fstype=nfs,nfsvers=4,lock,proto=tcp,rsize=32768,wsize=32768 server1:/share2

in AD:
CN=cluster.master,OU=automount,DC=mpi,DC=mpi-bremen,DC=de
CN=/groups2/biogeo/,CN=cluster.master,OU=automount,DC=mpi,DC=mpi-bremen,DC=de
nisMapEntry=cluster.groups

CN=cluster.groups,OU=automount,DC=mpi,DC=mpi-bremen,DC=de
CN=/groups2/biogeo/,CN=cluster.groups,OU=automount,DC=mpi,DC=mpi-bremen,DC=de
nisMapEntry=-fstype=nfs,nfsvers=4,lock,noatime,proto=tcp,rsize=32768,wsize=32768 samfs03.mpi-bremen.de:/global/sam/fs03/samfs/share/share01/

automount -m:
Mount point: /groups2/biogeo/

source(s):
lookup_read_map: lookup(sss): invalid path /groups2/biogeo/

instance type(s): sss
map: cluster.groups

no keys found in map

everything works with an analog setting where the mountpoint is on the top of the filesystem.

I'm wondering if I'm missing something or if I hit a limitation of AD or SSSD or the combination of both...

Any suggestions are really appreciated

Carsten