Hi @SunilP.89679 (Customer)​ , Thank you for reaching out to the Okta Community!

I'll try to answer your questions one by one, but please keep in mind that there are many possible variables and there might not necessarily be a straight answer for all your questions. 

1) What happens if there is a user with same username in hub ? which user password will be retained in hub , is it of user present in hub or the user present in spoke ? what are the linked users in okta ?

• It all depends on what configuration you have - the pushed users could get a new account, or could be matched with the preexisting ones. 

2) When we enable group push , all the users accounts assigned to this group in spoke will be pushed to hub ? or do I need to assign this group to "Okta Org2Org" application so that these users are pushed to Hub?

• As long as the user is assigned to the Org2Org app, its membership to the Push Group should be sent down stream. 
• It's not recommended to use the same group for assignments as the ones for group push (see limitations under : https://help.okta.com/en-us/Content/Topics/users-groups-profiles/usgp-about-group-push.htm )

3) once all users from Spoke are pushed to hub , can I shut down the spoke okta tenant and use only hub for signing in the users ?

• Yes, but again it depends on the configuration - if the spoke is configured as a IDP for the user, then you'll have to sever the link before you can sign in. Password resets might also be required. 

4) Can I use inline hooks in hub when a user is being created in hub from spoke ? I need to be able specifically differentiate that the user is being created through Okta Org2Org application .

• There is no explicit marker for a user profile in relation to the source of creation. At best, if the Org2Org implementation is also configured as the IDP, the users page would show a message that says "Profile Sourced by Org2Org" - see below example:

5) how to push applications also from spoke to hub ?

• Applications or application configuration currently cannot be pushed to other orgs. You can suggest this as a feature enhancement on the Okta Community page by going to the Community→ Ideas tab. Features suggested in our community are reviewed and can be voted and commented on by other members. High popularity will increase the likelihood of it being picked up by the Product Team and it being implemented. 

More details here: 

• https://support.okta.com/help/s/blog/a674z000001cj7YAAQ/okta-ideas-faq?language=en_US

If my answer helped, remember to mark it as best to increase its visibility for other members of the Okta Community who might have the same questions as you. 

Hope it helps!