I'm not 100% sure if this is the correct section for this, but given I have no idea what the problem is! I thought I would start here.
I do IT work for a small charity, they were running POP email accounts with only local copies of emails. Services were provided by their web provider so we had no administration control over emails.
I have migrated all emails, via PST upload to exchange online. Migration went well, all emails available and full send/receive functionality post migration.
HOWEVER! They can no longer access the website for their domain. For example: all email addresses associated with contoso.com are sending/receiving fine. On their 3 computer internal network they can no longer access
www.contoso.com. It simply times out and says website unavailable.
The network consists of a BT Business Broadband router (running DHCP), a Synology DiskStation for data storage with a connected laser printer. Users log in with a local account on each computer. All computers running Windows 7.
Full connectivity to other websites works fine. The website works fine outside the network.
What I've done so far:
ping fails
Flushed DNS with IP config
Changed DNS servers to Google DNS
Host file is empty
Firewall on/off - still fails
AV on/off - still fails
What works:
I've installed a VPN chrome extension that allows it to connect
My question is... Is this just a horrible coincidence relating to the exchange migration (and I'm chasing down a never ending rabbit hole) or have I inadvertently changed something causing this to happen?
I've pretty much run out of ideas so any suggestions gratefully received.
Jonathan