RE: PEAP Inner Tunnel Question

...so it's a bit vague, but implies that, per protocol spec, any EAP inner is acceptable.

Not to Microsoft. MS only accepts EAP-MSCHAPv2 or EAP-TLS on the inner (as Alan B originally pointed out, Microsoft refers to this as PEAP-EAP-TLS). But since EAP-TLS was not on the list of items the original poster listed (he had PAP, MSCHAP, MD5 and GTC), I left that off because there's no point in referring to something that's not in the list he has access to. Stefan Janet(UK) is a trading name of Jisc Collections and Janet Limited, a not-for-profit company which is registered in England under No. 2881024 and whose Registered Office is at Lumen House, Library Avenue, Harwell Oxford, Didcot, Oxfordshire. OX11 0SG. VAT No. 614944238