Can users attach their Creo session to a workspace?
Can users open files from within Creo that are in a workspace or Commonspace?
Can users select a file that is in their workspace from the file open requester?
Can users check in/upload and check out/download files using a browser external to Creo?
Put another way - are users able to use Creo linked to a workspace even though they can't perform workspace functions inside the Creo window using the internal browser?
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The puzzling thing about this situation is the thought** that a browser feature WC depends on is no longer available in the latest browser. Normally feature support increases with time, though deprecations are expected and usually announced in advance.
I do recall the entire point of a browser was to be OS, hardware, and website agnostic, but that doesn't seem to have happened. It's too bad the DOJ did not force MS to decouple the entire IE stack from Windows when they had the chance.
Best of luck on upgrading the server. There are a lot of people who could make use of it.
**Just a thought - I'm not certain why WC would not work with a newer browser. It could be a deprecated function, or the server is looking at the Browser ID and fails the interaction on that alone, or some even more sophisticated reason. Browser ID could also explain why using other browsers fails; they may be set to send a fake IE ID, which is also declined.