uidNumber and gidNumber - Dependency

Hi All,

Any information related to uidNumber and gidNumber usage in Active Directory is much appreciated. Thanks in advance for your help!

Here are my queries

1. Are there any known applications/products that requires uidNumber and gidNumber set for users and group objects in active directory?

2. How can we set uidNumbers and gidNumbers for large number of objects? Does Active directory had any in-built tools to manage large user base? Are there any popular 3rd party products which would help populating uidNumbers and gidNumbers for existing objects?

Thanks,

Eswar