What's the g_ and g1_ user on Centrestack server?

Q: On Centrestack server, you may see local users like glad1_<user>/g_<user>/g1_<user>. What's the users for?

A: Windows has a limitation. Under one user's session, can not access a SMB file share as multiple users. 

On Centrestack, when attach a share directly, with "Always access the storage using the logged in user's identity", each time an AD user accesses the team folder, Centrestack needs to access the share as the user.

. If Centrstack is on the same domain as the share, it can impersonate as the AD user and access the share. Here, no need to create the dummy g_ user/g1_user.

. If Centrestack is not on the domain as the share, it can not impersonate as the AD user. In this case, due to the windows limit, Centrestack cannot access the share as different AD users on the same session.  

As a workaround, Centrestack creates a dummy user like g_user/g1_user. A session as the dummy user is created. Centrestack will use the dummy user's session, to host the CIFS share connection for the AD user. The real connection to the share is still as the AD user.

Even when the Centrestack server is in the domain, if impersonating as the AD user directly hit some error, Centrestack will follow the same logic here to create the dummy user and use the user's session to access the share.