Q: Please help - Xsan, 2 editors and sharing projects!

Yeah, that's going to happen, because even if your user names on both edit stations are identical, OS X is going to recognize them as two different users based on their Universally Unigue Identifiers.

The primary way you avoid this is to have Open Directory running on one of your MDCs. The quick and dirty of it goes something like this:

-Configure one of your MDCs as an Open Directory Master (often your Back-up MDC).

-Create an Open Directory user for each editor in Workgroup Manager. In my experience it is best to assign users based on real people and not machines. If you create users called Edit1, Edit2, it will become much more confusing than if you use an actual user name (i.e., "jsmith").

-Create an Open Directory group that will contain all of the users you want to be able to share data on your Xsan (i.e., editors, all_users, everyone, etc).

-Add your two users to this new group. Now, any new data written to the Xsan by these users will also have the group's permissions as well, meaning any other group member will be able to access the data, even though they are not the original owner of those items.

-You only have two users, so this is as simple as it gets, but you can start building out more complex permissions so that users have access to some data, but not all. The best advice though is always to keep it as simple as possible. Many of the Xsans we set up never have more than one or two groups. We've seen many admins try to get fancy, and let me tell you, keeping it all straight can get out of hand fast.

JM