7.15.21 is the Provisioning Services version for Cumulative Update (CU) 5 of the XenApp and XenDesktop 7.15 Long Term Service Release (LTSR)  program. Provisioning Services 7.15.21 can be used by customers to upgrade 7.15 base environments.

Provisioning Services 7.15.21 contains all fixes that were included in the:

• 7.15 base release
• Cumulative Update (CU1-7.15.1), (CU1 HF1 7.15.2), (CU2-7.15.3), (CU3-7.15.9), and (CU4-7.15.15)

For a list of Issues fixed in Version 7.15.21.