Changes not applied after Disk expansion through extend volume wizard on windows 2008- Vsphere

Hi

We have a windows 2008 server and exchange runs on this and the free space on D was only 13GB where exchange database is hosted.
This server is Virtual machine and I went to VSphere and expanded the disk to another 59 Gb and I came to the server and on the Disk management, I clicked rescan discs and I was able to see the free space next to the D drive in disk mgmt...

I right clicked the D drive and clicked extend volume and said ok and ok and an error popped saying incorrect parameter.

Now on the Disk management  it shows the space available on D drive is  439.21GB , but when I open Drive properties , it shows Total space 379GB ( the Disk expansion has not applied)

Please see the snapshot   and any help much appreciated.
Thanks
Disk-expansion1.bmp
Disk-expansion2.bmp
lianne143Asked:
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StuartTechnical Architect - CloudCommented:
What does diskpart report?

Have you tried restarting the Volume Shadow Copy (VSS) service?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Restart the Server, (and/or keep re-scanning the disks!).

This is a common issue, which sometimes, is not plug and play.
lianne143Author Commented:
The server is doing a VEEAM back up , once it completes , I will restart the VSS and also rescan the disk.

On the diskaprt

DISKPART>list disk

Disk ###        Status        size                free        Dyn       Gpt
Disk 0              Online       500GB           0 B

DISKPART>
lianne143Author Commented:
I restarted the server and scanned the disks through the disk management and it is not showing the actual free space. Also restarted  VSS service.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Do you still see the unallocated portion of the disk ?

If you to Extend, do you still get an error message ?

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Windows Server 2008

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