Multiple login attribute best practices

[Zico]

Hello everyone,

I am just little bit curious on one issue. What if I have four SPs and
every SP require different type of  unique attributes? As for example:
SP1,SP2, SP3 and SP4 require Email, OrgID ( custom att. ),  SerialNum (
custom att. ) and UID respectively.

Now, I can definitely create and release these attributes from my IDP but
my question is: is it a good practice to use multiple attributes as the
NameID in same IDP?

What do you think?

Thanks in advance!

-- 
Best,
Zico
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