Where Azure AD v2.0 id_token is smaller than v1.0?

Azure AD v2.0 id_token is smaller than v1.0, because the number of default claims (properties) are reduced in Azure AD v2.0 id_tokens as shown in the table below:

Azure AD v2.0        Azure AD v1.0
ver=2.0              ver=1.0
                     rh
iss                  iss
sub                  sub
aud                  aud
exp                  exp 
iat                  iat 
nbf                  nbf 
oid                  oid
tid                  tid
aio                  aio
                     amr
                     idp 
                     uti
name                 
nonce                
                     email
                     ipaddr         The IP address the client logged in from.
                     given_name                
                     family_name
                     unique_name
preferred_username

See the next tutorial on how to add additional claims into Azure AD 2.0 id_tokens.

⇒ Adding Claims in Azure AD v2 id_token

⇐ Azure AD v2 id_token Decoded Example

⇑ Azure AD Integration v2.0

⇑⇑ OpenID Tutorials