Hi Friends 

we are 10 members , they need to access Sql servers throgh windows logins?

Can we use groups or Have to add each logon? 

We can do groups first how can I create windows Group account for all 10 Members?

Thank you for advance friends. 

Hi,You can use a group and add this via Management studio.

Hello,

>>We can do groups first how can I create windows Group account for all 10 Members?

Log into windows ..click on server manager...expand configuration..Local users and groups...RK on groups and select new group...Create a new group and add members you want to add.

>>How to add Windows login to SQL server.

Log inot SQL server as administrator...expand security..logins..RK on login and New login...Click radio button Windows Authentication..Select users and group windows occur..select Object type and then select Group...Then type the name of group and click OK.

If security is main feature I would like you to create individual login for each member in Windows and then grant each login access to SQL server

For details see below link

http://resources.arcgis.com/en/help/main/10.1/index.html#//002q00000029000000

Please refer this link http://technet.microsoft.com/en-us/library/ms173463.aspx

http://stackoverflow.com/questions/5029014/how-to-add-active-directory-user-group-as-login-in-sql-server