[emilpalm]

I'v used a shared dropbox folder with a KeePassX instance in it with a shared password for that container. If needed we could just change the password on the KeePassX container and/or remove the access to dropbox.

[gmuslera]

Used the same approach, but with a google drive document instead of dropbox. But you can't skip updating all (or at least, most of the perimetral ones ) passwords when a employee leaves (unless you trust him even after he leaves). If he made a local copy of the Keypassx file (or even pasted every password in a document, to cover most of the other alternatives) removing access to dropbox or changing master password will not stop him to keep accessing the old passwords. And the same goes with certificates.

[TheSilentMan]

Neither of those stop someone who saved a copy of the keepass db outside of dropbox. You'd also have to change every password contained in keypass.

[csarva]

Same goes for any centralized service you may use. You are still able to copy passwords manually into a text file, local keepass, etc. True, it is easier with a shared keepass, but the challenge is the same if you truly need to make sure a former employee can no longer access anything.