Spent hours to fight with Update Manager installation error 25085 "Setup failed to register VMware vSphere Update Manager extension to VMware vCenter Server...).
Found an answer in KB Article: 1014119
This issue occurs if the credentials specified for the following contain a semicolon:
- vCenter Server authentication
- Update Manager database authentication
To resolve this issue, remove the semicolon and retry the installation.
Wow. I would expect to see this in the installation guide :-)
We used a password with a semicolon.
So, if you are installing Update Manager 4.X/5.0 make sure that password doesn't include a semicolon.
Regards,
Joseph