https://www.dotnetzone.gr:443/cs/blogs/pkefal/archive/2009/11/25/windows-azure-amp-ndash-upgrade-your-service-without-disruption-vip-swap.aspxPerforming an in-place upgrade on Windows Azure to change your service definition file it’s not possible unless you stop the service, upgrade and then start it again. Otherwise you can do a VIP Swap. VIP stands for Virtual IP and VIP swaps can be eitherelCommunityServer 2.1 SP3 (Build: 20423.1)