2FA/MFA, Supported Hardware Tokens (YubiKey, OTP C200)

Multifactor authentication only works with specific hardware tokens: the YubiKey 5 NFC, YubiKey 5 Nano, and OTP C200. The YubiKey 4 and OTP C100 are not supported by Microsoft Authenticator. If you have an older token, it needs to be replaced before Duo is retired in April 2027.

Use this guide to identify old and new hardware tokens. If you have an old, incompatible model, please contact your departmental purchasers (faculty) or the IT Partners @ Gies Help Desk (staff) to arrange for a replacement.

Current, supported models of YubiKey and OTP token

YubiKey 5 NFC, USB-A and USB-C variants. Note the "FIDO" label.

device back showing FIDO label

OTP c200 variants, either labeled or unlabeled

labeled variant Unlabeled variant

 

Old, unsupported models of YubiKey and OTP token

YubiKey 4, USB-A. Note the serial number instead of "FIDO."

device back showing serial number partially blurred

device front showing y logo

OTP c100

device labeled OTP c100

 


Keywords:
compare, "old model", YubiKey, multifactor, authentication, "old version", Duo, "MS Authenticator", authenticator, authenticate, login, signin, "sign in", two-factor, 2-factor 
Doc ID:
165195
Owned by:
Allison P. in UI Gies College of Business
Created:
2026-10-29
Updated:
2026-10-29
Sites:
UI Gies College of Business