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Ill reply here mate as you didnt reply in the other thread, no nothing has changed no windows updates, we control the GPO nothing has changed here we are in the middle of opening a case with microsoft i just wanted to post it here in case anyone came across it and had some tips as we know how useful microsoft can be

Yup, I getcha. Just thought I'd ask about any possible Changes. I hope MS can help you out!

This might be a reach, as I assume that was working before, according to your original post, but always thought that the A: drive was reserved and could not be mapped.