I think i have found the issue. It seems that the bruteforce app was causing the issue. I have now deleted all entries from the table oc_bruteforce_attempts and voila my desktop clients connect immedieately!
I found the hint here:
I think i have found the issue. It seems that the bruteforce app was causing the issue. I have now deleted all entries from the table oc_bruteforce_attempts and voila my desktop clients connect immedieately!
I found the hint here: