O365 users cannot see free/busy information of On-Prem users

Good day

We have a hybrid solution  setup between our On-Prem MS Exchange (2010) and O365. We have one problem where O365 users cannot see the free/busy information of any new domain added to the On-Prem Exchange (See attached). All the other domains we have and that were setup when the hybrid solution was deployed, still work fine (we can see free/busy). This only happens with new domains we setup for email.

Please can someone point me in the right direction to have this issue resolved?
Who is Participating?
Hasin Ahmed ChoudharyExchange AdministratorCommented:
How is free busy set up between both forest?  Federation trust or Org relationships?

Whatever method is, you need to re-do the configuration to include newly added domain.
iamdieterAuthor Commented:
Will give it a go and run a sync. Will let you know how it goes.
Hasin Ahmed ChoudharyExchange AdministratorCommented:
I have replied to answer
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