Background: All was working fine on OMV regarding SMB files shares with both Mac (Monterey) and Windows 11 machines but for some unknown reason quit working on the Mac. The error on Mac was due to permissions and would not let me copy folders from the Mac to any OMV SMB share. It would however place a folder in the share like it wanted to copy but was empty and subsequently would not delete for the same permissions issue. Nonetheless, I was allowed to copy "files" over to OMV shares from the Mac and could delete them as well. But "folders" had the permission issues. After much testing and research into permissions tricks (non terminal) using the OMV GUI (i.e. reset perms), I could get the fold to copy once but after that the issue came back with the need to use reset perms again.
Eventually, I removed all users from the OMV system and removed all SMB shares. I rebuilt the users and SMB file shares and all worked again. However, I knew there was one share that was allotted to the Time Machine support that would need to be enabled, so I enabled it and the problem came back exactly the same as before. Funny thing though is Time Machine had no problems running its backup to the shared SMB folder on OMV while this permissions thing was going on for everything else.
So, I disable Time Machine support and all is working again but without Time Machine support. My assumption now is that Time Machine support for one of the SMB shares was enough to screw up all the permissions for the rest of the shared folder on OMV. I'm not sure why and would like to know if someone can help get Time Machine support to work without messing up the permission on all other SMB shares that are not touched by Time Machine? Do I turn on Time Machine support on all my SMB shares regardless of needing it for Time Machine (probably no?)? I have 10 other ways of backing up my Mac but Time Machine seems kind of cool and was working OK previously (seemingly nothing changed except one weird issue where I couldn't access the OMV GUI and had to reboot OMV from the console. After that seems like when the problem started).
Thank you for this post. I had the same problem with my MacbookPro and Mac mini (both macOS Monterey installed). I couldn't copy any single file to the server because of "permission issues". I have searched the whole internet day by day to solve this matter. Yesterday I found your post and after disabling "Time Machine" on my OMV (v6) server, everything works like it should.
Now I have to find out why? Why does "time machine" has such an impact at "write permissions" on the server?
Is there anybody who has the same problem and could solve it?