Hi Mario
When endpoints look up phonebooks, it's a live lookup so there is a few steps you can do to verify that the phonebook setup is working as it should.
First of all the phonebook address configured on the endpoint. From the same network location the endpoint is located try to access the phonebook link from a regular browser. If you see the "Phonebook Service" you know that TMS is open for queries.
If you do not see the phonebook service you need to find out if this is isolated to that particular endpoint. If this is happening to all the endpoints, it's likely the Public folder in the IIS server does not have Anonymous access enabled with a valid user / domain user. Group policies can disable the standard service accounts so check this.
TMS also has a different feature where it filters out the phonebook entires. It basically checks if the endpoint that is looking up in the phonebook is routable. If not the entry does not show up. If you want it to show up regardless you can change the setting under general settings "Route phonebook entries" to "No" and see if this resolves your issue.
So if the phonebook address is correct and the IIS is not blocking the request and the endpoint is not filtered then check if the unit actually have a contact method. Endpoints without and address will not show up in the phonebook.
A last resort would be to do a wireshark capture while looking up the phonebook and raise a tac case for analysis.
Magnus Ohm
