"Error 25085.Setup failed to register VMware vCenter Update Manager extension" while installing Update Manager 6.5 on Windows

Products

• VMware vCenter Server
• VMware vSphere ESXi

Issue/Introduction

Symptoms:

• Installing Update manager on Windows vcenter 6.5 fails with the error:

"Error 25085.Setup failed to register VMware vCenter Update Manager extension"
 

• In the vminst.log file, you see entries similar to: 

VMware Update Manager-build-8305924: 10/05/18 05:04:06 --- CA exec: VMRegisterExtension
VMware Update Manager-build-8305924: 10/05/18 05:04:06 INFO: Reg/UnReg extn command: ["-v X.X.X.X -p 80 -U "[email protected]" -P *** -S "C:\Program Files\VMware\Infrastructure\Update Manager\extension.xml" -C "C:\Program Files\VMware\Infrastructure\Update Manager\\" -L "7185\" -O extupdate"]
VMware Update Manager-build-8305924: 10/05/18 05:04:06 AppendPath::done Path: C:\Program Files\VMware\Infrastructure\Update Manager\vciInstallUtils.exe
VMware Update Manager-build-8305924: 10/05/18 05:04:06 Found "C:\Program Files\VMware\Infrastructure\Update Manager\vciInstallUtils.exe"
VMware Update Manager-build-8305924: 10/05/18 05:04:06 Process returned 255
VMware Update Manager-build-8305924: 10/05/18 05:04:06 Error:: Other runtime error
VMware Update Manager-build-8305924: 10/05/18 05:04:06 ERROR: VUM registeration with VC failed.

Environment

VMware vCenter Server 6.5.x
VMware vSphere Update Manager 6.5.x

Cause

This issue occurs due to special characters in the users password.

For example, there may be a semicolon  or similar special characters in the password of the account which is used to install update manager. The semicolon is used as a separator when processed by the vciInstallUtils.exe command. 

Other problematic characters maybe non ASCII or: 

• ~ tilde
• ^ caret
• \ backslash

Resolution

Currently, there is no resolution.

Workaround:
To workaround this issue, remove the semicolon or special characters from the password of the account which is used to install the update manager.