The server is a 2008 standard VM. Host is ESXi5.5. It was built with a single disk that was 50GB. Recently the disk was increased to 80GB by editing the VM settings. This was done hot, and I have not had issue with this on any other VM. The server found the additional disk space, and went through the motions of extending the partition.
Now when I look in disk manager, I see the top screen still reporting a capacity of 50GB, but the lower screen showing an 80GB basic disk, with an 80GB primary partition, NTFS, (System,Boot,......) Explorer also still sees only a 50GB disk.
Server has been rebooted twice, the second time with chkdsk /f queued up, which did not find any errors.