Hi Pavan,
I will try to be more explicite and sorry my lack of knowlodge,
This happened because was removed the SMBv1 protocol from the server to avoid the recent malware contagious. Since the ClearPass was configured to use the MS-CHAP and MS-CHAPv2 authentication methods that use the SMBv1 protocol, it could not authenticate users through Active Directory.
The solution/workaround was changed the authentication settings in ClearPass to TLS, and on the wireless network we changed the authentication order for TLS and TTLS to take precedence over CHAP, MS-CHAP and MS-CHAPv2.
Everything works fine in micrsoft, android but in iOS since you can't choose the protocol it always goes looking the MSCHAPv2 insted of GTC.
It's possible to force, do something in clearpass?
It was tell me that a new release will be provided to support SMBv2/v3 in next 30 days but now, it is a workaround we can do?
Thank you