Document in DFS update

Dear all

One case, the DFS share on \\server\ABC which point to

1. AD Site A file server1 folder ABC

2. AD Site B file server2 folder ABC

When user A in AD site A access and edit \\server\ABC\test.txt, can user B in AD site B access \\server\ABC\test.txt ?

Any alert for user about the opening file?

thx

Q K