Question on DNS from a confused admin

[Glupii]

I have a simple domain setup with one Windows 2k3 server acting as the DNS server. I have the forwarders setup to look to the DNS servers given by our communications provider. (I am sure there is more info I could give here but not being sure what is pertanent I will keep it brief until asked)

My problem is, my DNS server does not seem to be updating fast enough. My company owns several domains that have recently changed their DNS entries. From outside the company I can see these changes have taken affect. But from inside only a few seem to have. My question is this, Can I change the period of time that passes before the DNS server will update itself from our ISP's server (if it even does this by default?) and if so how?

Edited December 7, 2005 by Glupii

[cluberti]

Do you host these domain servers, or are these hosted externally? If so, you should consider contacting your ISP and seeing what they have set for the TTL on domain records they cache.

[Glupii]

The only domain we host is our main one and it is hosted externally. All the other domains are (in the admin's words at the isp) in the header and are pointing to the main domain. The problem is he says they work from his end (I have not yet proven this by going home and testing the sites myself yet) and every one he tries send him to our main site. But from within the company, when I try to go to them I get a DNS error. I am thinking this is because I have one of my Domain Controllers setup as the DNS server as well and as I said, it is using forwarders to point to the DNS Servers given to us by our ISP. All the local machines point to the local DNS server.

[cluberti]

Have you cleared your DNS server's cache, and perhaps the client's DNS cache as well?