How's it going.Let me read of your question. Give me a minute.
This could be due to one of 2 things
Would you be able to screen shot the error?
It would be the registry.
Your free/busy status of others will not show If their company has not set it to public.
If that's the case local group policy editor could be installed.
Could I connect and have a look?
I can speak you through the steps, the remote assistance is optional.