AVD session host with Hybrid join

We have deployed a single and multi-session host on hybrid join. 

Single session host: 

Configured with local disk for user login and working fine for end users in Windows App.

Multi-session host:

Configured fslogix for multi user profile and Azure file share Configured with ADDS authentication and devices are hybrid joined.

All the AVD outbound urls are whitelisted on the firewall . 

Both avd single and Multi-session using same vet. 

All the ntfs and share permissions assigned properly for avd users group and the group is in sync with Azure AD.

Now when the avd end user trying to connect Multi-session host..the page is loading & connecting status for longer time , then fails to establish a avd connection. 

I believe all the outbound connections looks good and fslogix side as well..

Is there any other settings we need to look into it..kindly share you opinions..thanks