We have group of developers, Testers & BA's who will work for more that 30 projects under collection, so instead of adding them for each project want to create security groups at collection level so everyone will have access to all the projects under collection. On TFS, we want to have customized groups like Developers, Testers, BA's at collection level so they will have access to all the projects so that I don't need to add them for each project.
So instead of adding them for each project want to create security groups at collection level so everyone will have access to all the projects under collection? So how can I do that!!!
You can try to add the new customized groups as members of the "Project Collection Administrators" group. This will grant access to all projects in the collection, including the futures ones.