How many times did you found that after configured Shared Space and Hybrid Deployment with Skype online. No communications between onprem users and online users. Or some issues with federation and onprem users.
Main reason, wrong DNS configuration.
So, today I bring to you this simple script to check the Hybrid DNS configuration. (All must point to Onprem)
Is a kind of «friendly html» result, so you can figure out what need to change.
Look like this.
If your SRV points to online must show as red, if wrong port show red. (so simple)
You can download it here
Hope it helps you.