None of my servers are setup to give anyone explicit access to tempdb and I have not experienced any problems because of it.

What brings this up? Are you having problems? Usually tempdb is just used by the server for temporary workspace. I don't know that I've ever seen an app that explicitly used tempdb.

-Mike

>I found we could set the permit in tempdb. If we didn't set users for permit in tempdb, the GUEST user will be used.
>
>What is difference in tempdb when we set permit or not permit for users?
>
>Thanks
>
>
>Jim