Hello aaroncatt9‌

By default, vCenter Single Sign-On passwords expire after 90 days. The vSphere Web Client reminds you when your password is about to expire, but there is no specific date on which it will prompt , it will just throw an warning

You can change this Password policy using the below link and set your custom days .

https://pubs.vmware.com/vsphere-60/index.jsp?topic=%2Fcom.vmware.vsphere.security.doc%2FGUID-B9C4409...

More information

Users in the vsphere.local domain can change their vCenter Single Sign-On passwords from the

vSphere Web Client. Users in other domains change their passwords following the rules for that domain.

You can change a vCenter Single Sign-On password from the vSphere Web Client.

The vCenter Single Sign-On lockout policy determines when your password expires. By default, vCenter

Single Sign-On user passwords expire after 90 days, but administrator passwords such as the password for

administrator@vsphere.local do not expire. vCenter Single Sign-On management interfaces show a warning

when your password is about to expire.

This procedure explains how you can change a password. If your password is expired, the administrator of

the local domain (vsphere.local by default) or another member of the Administrators group for the local

domain can reset the password by using the dir-cli password reset command.

Procedure to rest the Password incase if it expires

1 Log in to the vSphere Web Client using your vCenter Single Sign-On credentials.

2 In the upper navigation pane, to the left of the Help menu, click your user name to pull down the menu.

As an alternative, you can select Administration > Single Sign-On > Users and Groups and select Edit

User from the rightȬbuĴon menu.

3 Select Change Password and type your current password.

4 Type a new password and confirm it.

The password must conform to the password policy.

5 Click OK.

Let me know if you need more information on this , i can help you.