We are assigning an IP address to a Virtual Machine in OBAS, and on the Network tab of Virtual machine information the address is shown as assigned, but in fact it is not.
Software issue PBAS-29574 that was fixed in OBAS 4.5.3.
To resolve the issue, please upgrade to the latest version as described in How to upgrade OBAS system to the latest available version.
The workaround is to synchronize the VM from Provider Control Centre in OBAS under
Top > Service Director > Parallels Server Manager > Virtual Machines > [VM hostname] > Synchronize