We are using self-hosted here and do have the latest version of the office integration installed and are having the same issue - lots of needing to re-authenticate.

In our instance, it happens more with saving new docs to the repository as well as attaching files from the repository to emails in outlook - as an example, just now I tested saving a new Word doc to our repository using the LF ribbon button. First time I clicked "save as new document", got a credential validation pop-up, and exited the pop-up after using windows auth to validate my credentials. When I clicked "save as new document" again, I got another credential pop-up. Sometimes the pop-up will not require credential input (ex it will pop-up and then in 2s, disappear, leaving the repository folder tree) but it happens every time I've gone to perform the action so far and can cause incremental delays which quickly add up to make everyday processes much slower than they should be.

I have applied the fix on my local instance.  In my testing, I get prompted for my Laserfiche credentials once per day.  Can this setting be extended to a longer period of time? Where is this setting stored?  Registry? Cookie?