Can't connect to CIFS share

Hello guys,

as of recently I'm unable to connect to one of my CIFS shares and I've no clue why that may be. As you can see in the first attachment a connection attempt to tony prompts for user credentials but when I try to connect to Videos it claims not being able to find the resource which is obviously there :wall:
I'm pretty much a Solaris noob so bear with me...

# uname -a
SunOS datadump 5.11 snv_151a i86pc i386 i86pc Solaris

# sharemgr show -vp
default nfs=()
smb smb=()
        * /var/smb/cvol  smb=() "Default Share"
                  c$=/var/smb/cvol      "Default Share"
        * IPC$   smb=() "Remote IPC"
                  IPC$=IPC$     "Remote IPC"
zfs smb=()
    zfs/data/videos smb=()
          Videos=/data/videos
    zfs/rpool/export/tony smb=()
          tony=/export/tony

# pwd
/export

# /bin/ls -lv
drwxr-xr-x   3 root     root           3 Jul 30 23:42 tony
     0:owner@:list_directory/read_data/add_file/write_data/add_subdirectory
         /append_data/read_xattr/write_xattr/execute/read_attributes
         /write_attributes/read_acl/write_acl/write_owner/synchronize:allow
     1:group@:list_directory/read_data/read_xattr/execute/read_attributes
         /read_acl/synchronize:allow
     2:everyone@:list_directory/read_data/read_xattr/execute/read_attributes
         /read_acl/synchronize:allow

# pwd
/data

# /bin/ls -lv

drwxrwxrwx   7 tony  public         7 Jul 30 23:18 videos
     0:owner@:list_directory/read_data/add_file/write_data/add_subdirectory
         /append_data/read_xattr/write_xattr/execute/read_attributes
         /write_attributes/read_acl/write_acl/write_owner/synchronize:allow
     1:group@:list_directory/read_data/add_file/write_data/add_subdirectory
         /append_data/read_xattr/execute/read_attributes/read_acl
         /synchronize:allow
     2:everyone@:list_directory/read_data/add_file/write_data
         /add_subdirectory/append_data/read_xattr/execute/read_attributes
         /read_acl/synchronize:allow

So data/videos has the full ACL set but I'm not able to connect. It used to work though. As far as I know I didn't fiddle with the access rights after setting them up through Windows where it still worked.
I think it has something to do with my zpool 'data'. I can't share any filesystems on that pool. Ex-/importing the pool didn't fix the issue either.
I'm pretty much at a loss here and really need your help :frowning:

tony~

Try using "ls -/ c"

I have the same problem and the ACLs are identical but the shares which work are those having xattr {A------m----} and those which fail have {}