On final migration day, I'll be removing the name from our old WSS 3.0 server (http://sharepoint.domain.com) and placing it on our SharePoint 2010 server. I'd still like to be able to access our old server at a URL just in case there are issues. I tried to Extend the Web App on our WSS 3.0 server, however, Service Unavailable was reported for all URLs (old & new). I got it working (with help from this forum - thank you!) but not with the Extended Web App in place. Had to back it out. Is there another way to access the server (perhaps using server name & port?) or do I need to set aside some server downtime where I can troubleshoot the Extended Web App/Service Unavailable issue?
Thanks in advance!