removing certain privileges from the role

[afaust]

Using the concept of DynamicAuthority you can basically implement user-only based permissions on the entire repository. This requires some Java development and working around registration issues (Alfresco did not intend that to be a public extension point). It is best used only for permission not involving the base READ access ones, because as soon as there is a single DynamicAuthority relating to READ, a critical optimisation Alfresco has in place for SOLR / query ACL checks will be disabled...

[aniruddha]

for new custom role how to give permissions like write, delete, view etc

[rupeshsawaliya]

Hi Aniruddha,
See if this link Custom Permission can help.

Regards,

Rupesh Sawaliya