I set up drive following your detailed video on permissions, thank you for your videos btw, I could watch all day. Everything works properly on mobile devices/web browsers, I can see my drive, and my teams folders, but when I am logged into the desktop client app for drive, I can see my drive, but not the my teams folders. Any tips on what might cause this?
Thank you.
I have Synology Drive set up on my rig but not Team Folder. However, when I clicked on Team Folder in the Drive Menu, I was presented with this:
Has that action been taken in your case?
Yep, I made sure that was enabled. It’s weird because when I log in as test user on the web app, or the mobile app, I can see the files in the team folder based off the permissions I set, with no issues, I just can’t see them in the drive desktop client. The permissions are very intricate. When deployed, there will be some folders in folders I need people to not access, etc. So I may have messed up along the way. I nuked all the permissions this morning, and I am going to rebuild my test folder and test it as I go.
I figured out the issue. Once everything was reset. I still couldn’t see the Teams folder… Figured it out. You have to mount MyDrive folder in the desktop client, and then mount the teams folder as well. 
I don’t know why I figured it would just mount both at once.
In my researching this, I found 5 other posts on other various sites with my exact same question, even the official Synology forums, all with no resolution. So, I hope someone possibly in my place in the future can find this post and it helps them.