This article explains how to increase the drive size on MCS created VMs on VMware.

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Instructions

To increase the drive size:

1. Delete the existing catalog.
2. Increase the drive size on master image.
3. Create a new machine catalog.

Note1: The drive space is set in the provisioning scheme of the catalog upon creation, and this cannot be modified. VMware will not allow you to do this due to existing snapshots for this VM. Also, removal of any snapshots from the master image will cause Citrix Studio to have problems.

Note2:This also applies to below actions :
- CPU change
- Memory change
- New Drive adding (Such as add D drive )

Disk Provisioned Size Greyed Out: https://communities.vmware.com/thread/272616
Create a Machine catalog: https://docs.citrix.com/en-us/xenapp-and-xendesktop/7-6-long-term-service-release/xad-build-new-enviroment/xad-mach-cat-intro/xad-mach-cat-create.html