Step1(Install Plugins):
- Install Communities
- Customer Communities
Step2:
- All -> Community -> Administration -> Forum
- Create Forum
- Create Forum Topic (if you are facing issue then go to "All -> Community -> Administration ->Topic" and create topics)
- Create Forum Content Types
- Create Forum Permissions
- Create Permission Exceptions
- Member Approval
- Forum Email Invite
CSM Forum Homepage
https://<put your instance>.service-now.com/community
